12689620772 has 12 divisors (see below), whose sum is σ = 22208738160. Its totient is φ = 6344267016.

The previous prime is 12689620759. The next prime is 12689620781. The reversal of 12689620772 is 27702698621.

It is a super-2 number, since 2×12689620772² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12689620772.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80822 + ... + 178637.

It is an arithmetic number, because the mean of its divisors is an integer number (1850728180).

Almost surely, 2^12689620772 is an apocalyptic number.

It is an amenable number.

12689620772 is a deficient number, since it is larger than the sum of its proper divisors (9519117388).

12689620772 is a wasteful number, since it uses less digits than its factorization.

12689620772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271690 (or 271688 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 12689620772 in words is "twelve billion, six hundred eighty-nine million, six hundred twenty thousand, seven hundred seventy-two".