12688939235 has 16 divisors (see below), whose sum is σ = 17477976000. Its totient is φ = 8662985856.

The previous prime is 12688939231. The next prime is 12688939259. The reversal of 12688939235 is 53293988621.

It is not a de Polignac number, because 12688939235 - 2² = 12688939231 is a prime.

It is a super-2 number, since 2×12688939235² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12688939231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 783560 + ... + 799589.

It is an arithmetic number, because the mean of its divisors is an integer number (1092373500).

Almost surely, 2^12688939235 is an apocalyptic number.

12688939235 is a deficient number, since it is larger than the sum of its proper divisors (4789036765).

12688939235 is a wasteful number, since it uses less digits than its factorization.

12688939235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583390.

The product of its digits is 5598720, while the sum is 56.

The spelling of 12688939235 in words is "twelve billion, six hundred eighty-eight million, nine hundred thirty-nine thousand, two hundred thirty-five".