| Base | Representation |
|---|---|
| bin | 10011010011100… |
| … | …00100010110000 |
| 3 | 102021201111020000 |
| 4 | 21221300202300 |
| 5 | 312424113210 |
| 6 | 24022550000 |
| 7 | 4004324115 |
| oct | 1151604260 |
| 9 | 367644200 |
| 10 | 161941680 |
| 11 | 834591aa |
| 12 | 46298300 |
| 13 | 277204a4 |
| 14 | 1771690c |
| 15 | e33cac0 |
| hex | 9a708b0 |
161941680 has 200 divisors, whose sum is σ = 572372592. Its totient is φ = 42425856.
The previous prime is 161941673. The next prime is 161941687. The reversal of 161941680 is 86149161.
It is a happy number.
161941680 is a `hidden beast` number, since 161 + 9 + 416 + 80 = 666.
It is an interprime number because it is at equal distance from previous prime (161941673) and next prime (161941687).
It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is not an unprimeable number, because it can be changed into a prime (161941687) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 433974 + ... + 434346.
Almost surely, 2161941680 is an apocalyptic number.
161941680 is a gapful number since it is divisible by the number (10) 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 161941680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286186296).
161941680 is an abundant number, since it is smaller than the sum of its proper divisors (410430912).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
161941680 is a wasteful number, since it uses less digits than its factorization.
161941680 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 465 (or 450 counting only the distinct ones).
The product of its (nonzero) digits is 10368, while the sum is 36.
The square root of 161941680 is about 12725.6308291574. The cubic root of 161941680 is about 545.0707536568.
The spelling of 161941680 in words is "one hundred sixty-one million, nine hundred forty-one thousand, six hundred eighty".
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