12640633412 has 24 divisors (see below), whose sum is σ = 24720710112. Its totient is φ = 5605601600.

The previous prime is 12640633403. The next prime is 12640633433. The reversal of 12640633412 is 21433604621.

It is a super-2 number, since 2×12640633412² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3501698 + ... + 3505305.

It is an arithmetic number, because the mean of its divisors is an integer number (1030029588).

Almost surely, 2^12640633412 is an apocalyptic number.

It is an amenable number.

12640633412 is a deficient number, since it is larger than the sum of its proper divisors (12080076700).

12640633412 is a wasteful number, since it uses less digits than its factorization.

12640633412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007059 (or 7007057 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 12640633412 in words is "twelve billion, six hundred forty million, six hundred thirty-three thousand, four hundred twelve".