12664372812 has 72 divisors (see below), whose sum is σ = 37018958256. Its totient is φ = 3340052352.

The previous prime is 12664372811. The next prime is 12664372823. The reversal of 12664372812 is 21827346621.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (12664372811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 820743 + ... + 836030.

It is an arithmetic number, because the mean of its divisors is an integer number (514152198).

Almost surely, 2^12664372812 is an apocalyptic number.

12664372812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12664372812 is an abundant number, since it is smaller than the sum of its proper divisors (24354585444).

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

12664372812 is a wasteful number, since it uses less digits than its factorization.

12664372812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656807 (or 1656798 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The spelling of 12664372812 in words is "twelve billion, six hundred sixty-four million, three hundred seventy-two thousand, eight hundred twelve".