12644432952 has 16 divisors (see below), whose sum is σ = 31611082440. Its totient is φ = 4214810976.

The previous prime is 12644432909. The next prime is 12644432993. The reversal of 12644432952 is 25923444621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263425663 + ... + 263425710.

Almost surely, 2^12644432952 is an apocalyptic number.

12644432952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12644432952 is an abundant number, since it is smaller than the sum of its proper divisors (18966649488).

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

12644432952 is a wasteful number, since it uses less digits than its factorization.

12644432952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526851382 (or 526851378 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The spelling of 12644432952 in words is "twelve billion, six hundred forty-four million, four hundred thirty-two thousand, nine hundred fifty-two".