12642645652 has 48 divisors (see below), whose sum is σ = 27744135552. Its totient is φ = 4907111040.

The previous prime is 12642645647. The next prime is 12642645683. The reversal of 12642645652 is 25654624621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12642645599 and 12642645608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308374 + ... + 346957.

It is an arithmetic number, because the mean of its divisors is an integer number (578002824).

Almost surely, 2^12642645652 is an apocalyptic number.

It is an amenable number.

12642645652 is an abundant number, since it is smaller than the sum of its proper divisors (15101489900).

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

12642645652 is a wasteful number, since it uses less digits than its factorization.

12642645652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655408 (or 655406 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The spelling of 12642645652 in words is "twelve billion, six hundred forty-two million, six hundred forty-five thousand, six hundred fifty-two".