12637696478 has 16 divisors (see below), whose sum is σ = 20727642096. Its totient is φ = 5731136640.

The previous prime is 12637696447. The next prime is 12637696559. The reversal of 12637696478 is 87469673621.

It is a super-2 number, since 2×12637696478² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 653801 + ... + 672852.

It is an arithmetic number, because the mean of its divisors is an integer number (1295477631).

Almost surely, 2^12637696478 is an apocalyptic number.

12637696478 is a deficient number, since it is larger than the sum of its proper divisors (8089945618).

12637696478 is a wasteful number, since it uses less digits than its factorization.

12637696478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327099.

The product of its digits is 18289152, while the sum is 59.

The spelling of 12637696478 in words is "twelve billion, six hundred thirty-seven million, six hundred ninety-six thousand, four hundred seventy-eight".