| Base | Representation |
|---|---|
| bin | 10011001110001… |
| … | …10000111100000 |
| 3 | 102020102000122210 |
| 4 | 21213012013200 |
| 5 | 312234243431 |
| 6 | 24000002120 |
| 7 | 3665356002 |
| oct | 1147060740 |
| 9 | 366360583 |
| 10 | 161243616 |
| 11 | 83021796 |
| 12 | 46000340 |
| 13 | 27537831 |
| 14 | 175b4372 |
| 15 | e250d46 |
| hex | 99c61e0 |
161243616 has 96 divisors (see below), whose sum is σ = 446584320. Its totient is φ = 50840064.
The previous prime is 161243603. The next prime is 161243629. The reversal of 161243616 is 616342161.
It is an interprime number because it is at equal distance from previous prime (161243603) and next prime (161243629).
It is a tau number, because it is divible by the number of its divisors (96).
It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.
It is a nude number because it is divisible by every one of its digits.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227070 + ... + 227778.
It is an arithmetic number, because the mean of its divisors is an integer number (4651920).
Almost surely, 2161243616 is an apocalyptic number.
161243616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 161243616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223292160).
161243616 is an abundant number, since it is smaller than the sum of its proper divisors (285340704).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
161243616 is a wasteful number, since it uses less digits than its factorization.
161243616 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 848 (or 840 counting only the distinct ones).
The product of its digits is 5184, while the sum is 30.
The square root of 161243616 is about 12698.1737269577. The cubic root of 161243616 is about 544.2864336437.
Adding to 161243616 its reverse (616342161), we get a palindrome (777585777).
The spelling of 161243616 in words is "one hundred sixty-one million, two hundred forty-three thousand, six hundred sixteen".
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