136642500864 has 108 divisors (see below), whose sum is σ = 396151877212. Its totient is φ = 45295718400.

The previous prime is 136642500859. The next prime is 136642500881. The reversal of 136642500864 is 468005246631.

136642500864 is a `hidden beast` number, since 1 + 3 + 6 + 64 + 2 + 500 + 86 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1065369600 + 135577131264 = 32640^2 + 368208^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 253194 + ... + 580854.

Almost surely, 2^136642500864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136642500864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198075938606).

136642500864 is an abundant number, since it is smaller than the sum of its proper divisors (259509376348).

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

136642500864 is a wasteful number, since it uses less digits than its factorization.

136642500864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327864 (or 327847 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 136642500864 in words is "one hundred thirty-six billion, six hundred forty-two million, five hundred thousand, eight hundred sixty-four".