12637777664 has 18 divisors (see below), whose sum is σ = 25226189520. Its totient is φ = 6318888704.

The previous prime is 12637777661. The next prime is 12637777681. The reversal of 12637777664 is 46677773621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12637777661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24682904 + ... + 24683415.

Almost surely, 2^12637777664 is an apocalyptic number.

It is an amenable number.

12637777664 is a deficient number, since it is larger than the sum of its proper divisors (12588411856).

12637777664 is an frugal number, since it uses more digits than its factorization.

12637777664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49366335 (or 49366321 counting only the distinct ones).

The product of its digits is 12446784, while the sum is 56.

The spelling of 12637777664 in words is "twelve billion, six hundred thirty-seven million, seven hundred seventy-seven thousand, six hundred sixty-four".