2157662864836 has 24 divisors (see below), whose sum is σ = 3777579638784. Its totient is φ = 1078354509120.

The previous prime is 2157662864729. The next prime is 2157662864891. The reversal of 2157662864836 is 6384682667512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172565361 + ... + 172577863.

It is an arithmetic number, because the mean of its divisors is an integer number (157399151616).

Almost surely, 2^{2157662864836} is an apocalyptic number.

It is an amenable number.

2157662864836 is a deficient number, since it is larger than the sum of its proper divisors (1619916773948).

2157662864836 is a wasteful number, since it uses less digits than its factorization.

2157662864836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28131 (or 28129 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 64.

The spelling of 2157662864836 in words is "two trillion, one hundred fifty-seven billion, six hundred sixty-two million, eight hundred sixty-four thousand, eight hundred thirty-six".