12937722861 has 12 divisors (see below), whose sum is σ = 19715419616. Its totient is φ = 7392686640.

The previous prime is 12937722851. The next prime is 12937722881. The reversal of 12937722861 is 16822773921.

It is a happy number.

It is not a de Polignac number, because 12937722861 - 2¹⁵ = 12937690093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12937722861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12937722841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508831 + ... + 533651.

Almost surely, 2^12937722861 is an apocalyptic number.

It is an amenable number.

12937722861 is a deficient number, since it is larger than the sum of its proper divisors (6777696755).

12937722861 is an frugal number, since it uses more digits than its factorization.

12937722861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49652 (or 24831 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The spelling of 12937722861 in words is "twelve billion, nine hundred thirty-seven million, seven hundred twenty-two thousand, eight hundred sixty-one".