12646438272 has 96 divisors (see below), whose sum is σ = 39190831680. Its totient is φ = 3891207168.

The previous prime is 12646438237. The next prime is 12646438309. The reversal of 12646438272 is 27283464621.

It is a happy number.

12646438272 is a `hidden beast` number, since 1 + 264 + 6 + 4 + 382 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 407248 + ... + 437199.

It is an arithmetic number, because the mean of its divisors is an integer number (408237830).

Almost surely, 2^12646438272 is an apocalyptic number.

12646438272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12646438272 is an abundant number, since it is smaller than the sum of its proper divisors (26544393408).

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

12646438272 is a wasteful number, since it uses less digits than its factorization.

12646438272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844480 (or 844465 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The spelling of 12646438272 in words is "twelve billion, six hundred forty-six million, four hundred thirty-eight thousand, two hundred seventy-two".