12642642464 has 12 divisors (see below), whose sum is σ = 24890202414. Its totient is φ = 6321321216.

The previous prime is 12642642457. The next prime is 12642642479. The reversal of 12642642464 is 46424624621.

It can be written as a sum of positive squares in only one way, i.e., 8712355600 + 3930286864 = 93340^2 + 62692^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197541257 + ... + 197541320.

Almost surely, 2^12642642464 is an apocalyptic number.

It is an amenable number.

12642642464 is a deficient number, since it is larger than the sum of its proper divisors (12247559950).

12642642464 is an equidigital number, since it uses as much as digits as its factorization.

12642642464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395082587 (or 395082579 counting only the distinct ones).

The product of its digits is 442368, while the sum is 41.

The spelling of 12642642464 in words is "twelve billion, six hundred forty-two million, six hundred forty-two thousand, four hundred sixty-four".