12639799497 has 24 divisors (see below), whose sum is σ = 18294981408. Its totient is φ = 7758816000.

The previous prime is 12639799453. The next prime is 12639799507. The reversal of 12639799497 is 79499793621.

It is not a de Polignac number, because 12639799497 - 2⁷ = 12639799369 is a prime.

It is a super-2 number, since 2×12639799497² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12639799297) 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, 172222 + ... + 234392.

It is an arithmetic number, because the mean of its divisors is an integer number (762290892).

Almost surely, 2^12639799497 is an apocalyptic number.

It is an amenable number.

12639799497 is a deficient number, since it is larger than the sum of its proper divisors (5655181911).

12639799497 is a wasteful number, since it uses less digits than its factorization.

12639799497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62601 (or 62588 counting only the distinct ones).

The product of its digits is 46294416, while the sum is 66.

The spelling of 12639799497 in words is "twelve billion, six hundred thirty-nine million, seven hundred ninety-nine thousand, four hundred ninety-seven".