12509681769 has 32 divisors (see below), whose sum is σ = 19976960640. Its totient is φ = 7691132736.

The previous prime is 12509681753. The next prime is 12509681777. The reversal of 12509681769 is 96718690521.

12509681769 is a `hidden beast` number, since 1 + 2 + 509 + 68 + 1 + 76 + 9 = 666.

It is not a de Polignac number, because 12509681769 - 2⁴ = 12509681753 is a prime.

It is a super-2 number, since 2×12509681769² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12509681729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 376114 + ... + 408020.

It is an arithmetic number, because the mean of its divisors is an integer number (624280020).

Almost surely, 2^12509681769 is an apocalyptic number.

It is an amenable number.

12509681769 is a deficient number, since it is larger than the sum of its proper divisors (7467278871).

12509681769 is a wasteful number, since it uses less digits than its factorization.

12509681769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33046 (or 33040 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 12509681769 in words is "twelve billion, five hundred nine million, six hundred eighty-one thousand, seven hundred sixty-nine".