136561640023 has 16 divisors (see below), whose sum is σ = 141365435904. Its totient is φ = 131845950720.

The previous prime is 136561640021. The next prime is 136561640027. The reversal of 136561640023 is 320046165631.

It is a cyclic number.

It is not a de Polignac number, because 136561640023 - 2¹ = 136561640021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136561640021) 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, 1350828 + ... + 1448398.

It is an arithmetic number, because the mean of its divisors is an integer number (8835339744).

Almost surely, 2^136561640023 is an apocalyptic number.

136561640023 is a deficient number, since it is larger than the sum of its proper divisors (4803795881).

136561640023 is an equidigital number, since it uses as much as digits as its factorization.

136561640023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98022.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 136561640023 in words is "one hundred thirty-six billion, five hundred sixty-one million, six hundred forty thousand, twenty-three".