136561640013 has 20 divisors (see below), whose sum is σ = 204039744480. Its totient is φ = 91023127272.

The previous prime is 136561639997. The next prime is 136561640021. The reversal of 136561640013 is 310046165631.

136561640013 is a `hidden beast` number, since 1 + 3 + 6 + 5 + 6 + 1 + 640 + 0 + 1 + 3 = 666.

It is not a de Polignac number, because 136561640013 - 2⁴ = 136561639997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136561640013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136561640063) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 253128 + ... + 580686.

It is an arithmetic number, because the mean of its divisors is an integer number (10201987224).

Almost surely, 2^136561640013 is an apocalyptic number.

It is an amenable number.

136561640013 is a deficient number, since it is larger than the sum of its proper divisors (67478104467).

136561640013 is an equidigital number, since it uses as much as digits as its factorization.

136561640013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332718 (or 332709 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 136561640013 in words is "one hundred thirty-six billion, five hundred sixty-one million, six hundred forty thousand, thirteen".