26664491564 has 24 divisors (see below), whose sum is σ = 46738944000. Its totient is φ = 13310530640.

The previous prime is 26664491533. The next prime is 26664491599. The reversal of 26664491564 is 46519446662.

It is a super-2 number, since 2×26664491564² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11113637 + ... + 11116035.

It is an arithmetic number, because the mean of its divisors is an integer number (1947456000).

Almost surely, 2^26664491564 is an apocalyptic number.

It is an amenable number.

26664491564 is a deficient number, since it is larger than the sum of its proper divisors (20074452436).

26664491564 is a wasteful number, since it uses less digits than its factorization.

26664491564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5773 (or 5771 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 53.

The spelling of 26664491564 in words is "twenty-six billion, six hundred sixty-four million, four hundred ninety-one thousand, five hundred sixty-four".