12765944736 has 84 divisors (see below), whose sum is σ = 37682261442. Its totient is φ = 4255307136.

The previous prime is 12765944717. The next prime is 12765944783. The reversal of 12765944736 is 63744956721.

12765944736 is a `hidden beast` number, since 1 + 2 + 7 + 6 + 594 + 47 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9301445136 + 3464499600 = 96444^2 + 58860^2 .

It is a super-2 number, since 2×12765944736² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 250291 + ... + 296946.

Almost surely, 2^12765944736 is an apocalyptic number.

12765944736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12765944736 is an abundant number, since it is smaller than the sum of its proper divisors (24916316706).

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

12765944736 is an frugal number, since it uses more digits than its factorization.

12765944736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547265 (or 547242 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 54.

The spelling of 12765944736 in words is "twelve billion, seven hundred sixty-five million, nine hundred forty-four thousand, seven hundred thirty-six".