161155150056 has 96 divisors (see below), whose sum is σ = 447444171720. Its totient is φ = 52368691200.

The previous prime is 161155150043. The next prime is 161155150063. The reversal of 161155150056 is 650051551161.

It is a happy number.

161155150056 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 551 + 50 + 0 + 56 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 112336247556 + 48818902500 = 335166^2 + 220950^2 .

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 161155150056.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4033216 + ... + 4072976.

Almost surely, 2^161155150056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161155150056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223722085860).

161155150056 is an abundant number, since it is smaller than the sum of its proper divisors (286289021664).

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

161155150056 is a wasteful number, since it uses less digits than its factorization.

161155150056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41187 (or 41180 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 161155150056 in words is "one hundred sixty-one billion, one hundred fifty-five million, one hundred fifty thousand, fifty-six".