161536980 has 48 divisors (see below), whose sum is σ = 493424064. Its totient is φ = 39160320.

The previous prime is 161536957. The next prime is 161536997. The reversal of 161536980 is 89635161.

161536980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 121717 + ... + 123036.

It is an arithmetic number, because the mean of its divisors is an integer number (10279668).

Almost surely, 2^161536980 is an apocalyptic number.

161536980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161536980 is an abundant number, since it is smaller than the sum of its proper divisors (331887084).

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

161536980 is a wasteful number, since it uses less digits than its factorization.

161536980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244776 (or 244774 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 161536980 is about 12709.7199024998. The cubic root of 161536980 is about 544.6163222741.

The spelling of 161536980 in words is "one hundred sixty-one million, five hundred thirty-six thousand, nine hundred eighty".