| Base | Representation |
|---|---|
| bin | 10000010110000111101… |
| … | …01101010100011101110 |
| 3 | 1222200200001111212210100 |
| 4 | 20023003311222203232 |
| 5 | 33200210112423200 |
| 6 | 1110002045251530 |
| 7 | 55401514623222 |
| oct | 10130365524356 |
| 9 | 1880601455710 |
| 10 | 561631373550 |
| 11 | 1a72062a5665 |
| 12 | 90a21263ba6 |
| 13 | 40c66876c50 |
| 14 | 1d27c616782 |
| 15 | e9216d0d00 |
| hex | 82c3d6a8ee |
561631373550 has 144 divisors (see below), whose sum is σ = 1629648820800. Its totient is φ = 137851096320.
The previous prime is 561631373543. The next prime is 561631373621. The reversal of 561631373550 is 55373136165.
561631373550 is a `hidden beast` number, since 5 + 6 + 1 + 63 + 1 + 37 + 3 + 550 = 666.
561631373550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a super-3 number, since 3×5616313735503 (a number of 36 digits) contains 333 as substring.
It is a Harshad number since it is a multiple of its sum of digits (45).
It is a junction number, because it is equal to n+sod(n) for n = 561631373496 and 561631373505.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1904107 + ... + 2179193.
It is an arithmetic number, because the mean of its divisors is an integer number (11317005700).
Almost surely, 2561631373550 is an apocalyptic number.
561631373550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 561631373550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814824410400).
561631373550 is an abundant number, since it is smaller than the sum of its proper divisors (1068017447250).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
561631373550 is a wasteful number, since it uses less digits than its factorization.
561631373550 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 275467 (or 275459 counting only the distinct ones).
The product of its (nonzero) digits is 850500, while the sum is 45.
The spelling of 561631373550 in words is "five hundred sixty-one billion, six hundred thirty-one million, three hundred seventy-three thousand, five hundred fifty".
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