161613156 has 24 divisors (see below), whose sum is σ = 383281024. Its totient is φ = 52987680.

The previous prime is 161613149. The next prime is 161613173. The reversal of 161613156 is 651316161.

It is a super-2 number, since 2×161613156² = 52237624384560672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109660 + ... + 111123.

Almost surely, 2^161613156 is an apocalyptic number.

It is an amenable number.

161613156 is an abundant number, since it is smaller than the sum of its proper divisors (221667868).

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

161613156 is a wasteful number, since it uses less digits than its factorization.

161613156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220851 (or 220849 counting only the distinct ones).

The product of its digits is 3240, while the sum is 30.

The square root of 161613156 is about 12712.7163108440. The cubic root of 161613156 is about 544.7019170677.

The spelling of 161613156 in words is "one hundred sixty-one million, six hundred thirteen thousand, one hundred fifty-six".