161562535560 has 48 divisors (see below), whose sum is σ = 525078241740. Its totient is φ = 43083342720.

The previous prime is 161562535493. The next prime is 161562535591. The reversal of 161562535560 is 65535265161.

161562535560 is a `hidden beast` number, since 1 + 6 + 1 + 5 + 62 + 535 + 56 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 151665071364 + 9897464196 = 389442^2 + 99486^2 .

It is a super-2 number, since 2×161562535560² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224392051 + ... + 224392770.

Almost surely, 2^161562535560 is an apocalyptic number.

161562535560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161562535560 is an abundant number, since it is smaller than the sum of its proper divisors (363515706180).

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

161562535560 is a wasteful number, since it uses less digits than its factorization.

161562535560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448784838 (or 448784831 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 161562535560 in words is "one hundred sixty-one billion, five hundred sixty-two million, five hundred thirty-five thousand, five hundred sixty".