26802689664 has 64 divisors (see below), whose sum is σ = 71885960640. Its totient is φ = 8847476736.

The previous prime is 26802689657. The next prime is 26802689681. The reversal of 26802689664 is 46698620862.

It is a tau number, because it is divible by the number of its divisors (64).

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, 299277 + ... + 378380.

It is an arithmetic number, because the mean of its divisors is an integer number (1123218135).

Almost surely, 2^26802689664 is an apocalyptic number.

26802689664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

26802689664 is an abundant number, since it is smaller than the sum of its proper divisors (45083270976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26802689664 is a wasteful number, since it uses less digits than its factorization.

26802689664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677777 (or 677765 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 57.

The spelling of 26802689664 in words is "twenty-six billion, eight hundred two million, six hundred eighty-nine thousand, six hundred sixty-four".