161539056 has 80 divisors (see below), whose sum is σ = 529926400. Its totient is φ = 46153152.

The previous prime is 161539039. The next prime is 161539067. The reversal of 161539056 is 650935161.

161539056 is a `hidden beast` number, since 1 + 615 + 39 + 0 + 5 + 6 = 666.

It is a super-2 number, since 2×161539056² = 52189733226742272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 161539056.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23686 + ... + 29733.

It is an arithmetic number, because the mean of its divisors is an integer number (6624080).

Almost surely, 2^161539056 is an apocalyptic number.

161539056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161539056 is an abundant number, since it is smaller than the sum of its proper divisors (368387344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161539056 is a wasteful number, since it uses less digits than its factorization.

161539056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53443 (or 53431 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 161539056 is about 12709.8015720152. The cubic root of 161539056 is about 544.6186553181.

The spelling of 161539056 in words is "one hundred sixty-one million, five hundred thirty-nine thousand, fifty-six".