3161645164872 has 24 divisors (see below), whose sum is σ = 8562788988390. Its totient is φ = 1053881721600.

The previous prime is 3161645164861. The next prime is 3161645164891. The reversal of 3161645164872 is 2784615461613.

3161645164872 is a `hidden beast` number, since 3 + 1 + 6 + 16 + 4 + 516 + 48 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2873411472996 + 288233691876 = 1695114^2 + 536874^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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, 21955869129 + ... + 21955869272.

Almost surely, 2^{3161645164872} is an apocalyptic number.

It is an amenable number.

3161645164872 is an abundant number, since it is smaller than the sum of its proper divisors (5401143823518).

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

3161645164872 is a wasteful number, since it uses less digits than its factorization.

3161645164872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43911738413 (or 43911738406 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 3161645164872 in words is "three trillion, one hundred sixty-one billion, six hundred forty-five million, one hundred sixty-four thousand, eight hundred seventy-two".