161270664 has 32 divisors (see below), whose sum is σ = 420707520. Its totient is φ = 51419456.

The previous prime is 161270633. The next prime is 161270723. The reversal of 161270664 is 466072161.

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, 145527 + ... + 146630.

It is an arithmetic number, because the mean of its divisors is an integer number (13147110).

Almost surely, 2^161270664 is an apocalyptic number.

It is an amenable number.

161270664 is an abundant number, since it is smaller than the sum of its proper divisors (259436856).

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

161270664 is a wasteful number, since it uses less digits than its factorization.

161270664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292189 (or 292185 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 161270664 is about 12699.2387173405. The cubic root of 161270664 is about 544.3168659314.

The spelling of 161270664 in words is "one hundred sixty-one million, two hundred seventy thousand, six hundred sixty-four".