12641972794 has 48 divisors (see below), whose sum is σ = 21552894720. Its totient is φ = 5551444800.

The previous prime is 12641972789. The next prime is 12641972797. The reversal of 12641972794 is 49727914621.

It is a happy number.

It is a super-2 number, since 2×12641972794² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12641972797) 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, 6068077 + ... + 6070159.

It is an arithmetic number, because the mean of its divisors is an integer number (449018640).

Almost surely, 2^12641972794 is an apocalyptic number.

12641972794 is a deficient number, since it is larger than the sum of its proper divisors (8910921926).

12641972794 is a wasteful number, since it uses less digits than its factorization.

12641972794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947 (or 2936 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 52.

The spelling of 12641972794 in words is "twelve billion, six hundred forty-one million, nine hundred seventy-two thousand, seven hundred ninety-four".