12641607645 has 64 divisors (see below), whose sum is σ = 22538649600. Its totient is φ = 6025662720.

The previous prime is 12641607623. The next prime is 12641607661. The reversal of 12641607645 is 54670614621.

It is not a de Polignac number, because 12641607645 - 2⁸ = 12641607389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12641607597 and 12641607606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 289776 + ... + 330534.

It is an arithmetic number, because the mean of its divisors is an integer number (352166400).

Almost surely, 2^12641607645 is an apocalyptic number.

12641607645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12641607645 is a deficient number, since it is larger than the sum of its proper divisors (9897041955).

12641607645 is a wasteful number, since it uses less digits than its factorization.

12641607645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40850.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 12641607645 in words is "twelve billion, six hundred forty-one million, six hundred seven thousand, six hundred forty-five".