2157867315165 has 16 divisors (see below), whose sum is σ = 3452876019648. Its totient is φ = 1150766462976.

The previous prime is 2157867315161. The next prime is 2157867315269. The reversal of 2157867315165 is 5615137687512.

It is not a de Polignac number, because 2157867315165 - 2² = 2157867315161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157867315161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5820772 + ... + 6180381.

It is an arithmetic number, because the mean of its divisors is an integer number (215804751228).

Almost surely, 2^{2157867315165} is an apocalyptic number.

It is an amenable number.

2157867315165 is a deficient number, since it is larger than the sum of its proper divisors (1295008704483).

2157867315165 is a wasteful number, since it uses less digits than its factorization.

2157867315165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12013148.

The product of its digits is 10584000, while the sum is 57.

The spelling of 2157867315165 in words is "two trillion, one hundred fifty-seven billion, eight hundred sixty-seven million, three hundred fifteen thousand, one hundred sixty-five".