136612633621 has 4 divisors (see below), whose sum is σ = 136661374432. Its totient is φ = 136563892812.

The previous prime is 136612633603. The next prime is 136612633657. The reversal of 136612633621 is 126336216631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136612633621 - 2²⁹ = 136075762709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136612633121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24366201 + ... + 24371806.

It is an arithmetic number, because the mean of its divisors is an integer number (34165343608).

Almost surely, 2^136612633621 is an apocalyptic number.

It is an amenable number.

136612633621 is a deficient number, since it is larger than the sum of its proper divisors (48740811).

136612633621 is an equidigital number, since it uses as much as digits as its factorization.

136612633621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48740810.

The product of its digits is 139968, while the sum is 40.

The spelling of 136612633621 in words is "one hundred thirty-six billion, six hundred twelve million, six hundred thirty-three thousand, six hundred twenty-one".