161292664 has 32 divisors (see below), whose sum is σ = 336924000. Its totient is φ = 71874432.

The previous prime is 161292643. The next prime is 161292671. The reversal of 161292664 is 466292161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23724 + ... + 29755.

It is an arithmetic number, because the mean of its divisors is an integer number (10528875).

Almost surely, 2^161292664 is an apocalyptic number.

It is an amenable number.

161292664 is an abundant number, since it is smaller than the sum of its proper divisors (175631336).

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

161292664 is a wasteful number, since it uses less digits than its factorization.

161292664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53527 (or 53523 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 161292664 is about 12700.1048814567. The cubic root of 161292664 is about 544.3416160963.

The spelling of 161292664 in words is "one hundred sixty-one million, two hundred ninety-two thousand, six hundred sixty-four".