12639601799 has 12 divisors (see below), whose sum is σ = 13920803568. Its totient is φ = 11467647840.

The previous prime is 12639601789. The next prime is 12639601817. The reversal of 12639601799 is 99710693621.

It is a happy number.

It is not a de Polignac number, because 12639601799 - 2¹⁶ = 12639536263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12639601799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12639601789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42974 + ... + 164699.

It is an arithmetic number, because the mean of its divisors is an integer number (1160066964).

Almost surely, 2^12639601799 is an apocalyptic number.

12639601799 is a deficient number, since it is larger than the sum of its proper divisors (1281201769).

12639601799 is a wasteful number, since it uses less digits than its factorization.

12639601799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208198 (or 208187 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 12639601799 in words is "twelve billion, six hundred thirty-nine million, six hundred one thousand, seven hundred ninety-nine".