12665736496 has 20 divisors (see below), whose sum is σ = 28045559632. Its totient is φ = 5428172736.

The previous prime is 12665736493. The next prime is 12665736521. The reversal of 12665736496 is 69463756621.

It is a happy number.

It is a super-2 number, since 2×12665736496² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12665736493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56543355 + ... + 56543578.

Almost surely, 2^12665736496 is an apocalyptic number.

12665736496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12665736496 is an abundant number, since it is smaller than the sum of its proper divisors (15379823136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12665736496 is a wasteful number, since it uses less digits than its factorization.

12665736496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113086948 (or 113086942 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 55.

The spelling of 12665736496 in words is "twelve billion, six hundred sixty-five million, seven hundred thirty-six thousand, four hundred ninety-six".