161496657 has 24 divisors (see below), whose sum is σ = 267883200. Its totient is φ = 91838880.

The previous prime is 161496649. The next prime is 161496667. The reversal of 161496657 is 756694161.

It is not a de Polignac number, because 161496657 - 2³ = 161496649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161496667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7219 + ... + 19367.

It is an arithmetic number, because the mean of its divisors is an integer number (11161800).

Almost surely, 2^161496657 is an apocalyptic number.

It is an amenable number.

161496657 is a deficient number, since it is larger than the sum of its proper divisors (106386543).

161496657 is a wasteful number, since it uses less digits than its factorization.

161496657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12373 (or 12370 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 161496657 is about 12708.1334978824. The cubic root of 161496657 is about 544.5710026380.

The spelling of 161496657 in words is "one hundred sixty-one million, four hundred ninety-six thousand, six hundred fifty-seven".