26887084864 has 28 divisors (see below), whose sum is σ = 54360746244. Its totient is φ = 13189889024.

The previous prime is 26887084841. The next prime is 26887084871. The reversal of 26887084864 is 46848078862.

It can be written as a sum of positive squares in 2 ways, for example, as 17369131264 + 9517953600 = 131792^2 + 97560^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3959917 + ... + 3966700.

It is an arithmetic number, because the mean of its divisors is an integer number (1941455223).

Almost surely, 2^26887084864 is an apocalyptic number.

It is an amenable number.

26887084864 is an abundant number, since it is smaller than the sum of its proper divisors (27473661380).

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

26887084864 is an equidigital number, since it uses as much as digits as its factorization.

26887084864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7926682 (or 7926672 counting only the distinct ones).

The product of its (nonzero) digits is 33030144, while the sum is 61.

The spelling of 26887084864 in words is "twenty-six billion, eight hundred eighty-seven million, eighty-four thousand, eight hundred sixty-four".