26864865504 has 72 divisors (see below), whose sum is σ = 77097940920. Its totient is φ = 8872789248.

The previous prime is 26864865499. The next prime is 26864865523. The reversal of 26864865504 is 40556846862.

26864865504 is a `hidden beast` number, since 2 + 6 + 8 + 6 + 4 + 86 + 550 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 396502 + ... + 459285.

It is an arithmetic number, because the mean of its divisors is an integer number (1070804735).

Almost surely, 2^26864865504 is an apocalyptic number.

26864865504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

26864865504 is an abundant number, since it is smaller than the sum of its proper divisors (50233075416).

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

26864865504 is a wasteful number, since it uses less digits than its factorization.

26864865504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855912 (or 855901 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 54.

The spelling of 26864865504 in words is "twenty-six billion, eight hundred sixty-four million, eight hundred sixty-five thousand, five hundred four".