161664024164 has 12 divisors (see below), whose sum is σ = 282923191404. Its totient is φ = 80828826624.

The previous prime is 161664024157. The next prime is 161664024209. The reversal of 161664024164 is 461420466161.

It can be written as a sum of positive squares in 2 ways, for example, as 97169358400 + 64494665764 = 311720^2 + 253958^2 .

It is a super-2 number, since 2×161664024164² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680297 + ... + 886640.

It is an arithmetic number, because the mean of its divisors is an integer number (23576932617).

Almost surely, 2^161664024164 is an apocalyptic number.

It is an amenable number.

161664024164 is a deficient number, since it is larger than the sum of its proper divisors (121259167240).

161664024164 is a wasteful number, since it uses less digits than its factorization.

161664024164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592734 (or 1592732 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 161664024164 in words is "one hundred sixty-one billion, six hundred sixty-four million, twenty-four thousand, one hundred sixty-four".