161700156 has 18 divisors (see below), whose sum is σ = 408742152. Its totient is φ = 53900040.

The previous prime is 161700139. The next prime is 161700173. The reversal of 161700156 is 651007161.

161700156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161700139) and next prime (161700173).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×161700156² = 52293880900848672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2245800 + ... + 2245871.

Almost surely, 2^161700156 is an apocalyptic number.

It is an amenable number.

161700156 is an abundant number, since it is smaller than the sum of its proper divisors (247041996).

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

161700156 is a wasteful number, since it uses less digits than its factorization.

161700156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491681 (or 4491676 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 161700156 is about 12716.1376211490. The cubic root of 161700156 is about 544.7996413021.

The spelling of 161700156 in words is "one hundred sixty-one million, seven hundred thousand, one hundred fifty-six".