12577726864 has 20 divisors (see below), whose sum is σ = 24376195404. Its totient is φ = 6287095808.

The previous prime is 12577726841. The next prime is 12577726871. The reversal of 12577726864 is 46862777521.

It can be written as a sum of positive squares in 2 ways, for example, as 176677264 + 12401049600 = 13292^2 + 111360^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50797 + ... + 166540.

Almost surely, 2^12577726864 is an apocalyptic number.

It is an amenable number.

12577726864 is a deficient number, since it is larger than the sum of its proper divisors (11798468540).

12577726864 is a wasteful number, since it uses less digits than its factorization.

12577726864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220962 (or 220956 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 55.

The spelling of 12577726864 in words is "twelve billion, five hundred seventy-seven million, seven hundred twenty-six thousand, eight hundred sixty-four".