25807503968 has 24 divisors (see below), whose sum is σ = 52447510080. Its totient is φ = 12487501440.

The previous prime is 25807503893. The next prime is 25807503971. The reversal of 25807503968 is 86930570852.

It is a super-2 number, since 2×25807503968² (a number of 22 digits) contains 22 as substring.

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, 13006823 + ... + 13008806.

It is an arithmetic number, because the mean of its divisors is an integer number (2185312920).

Almost surely, 2^25807503968 is an apocalyptic number.

It is an amenable number.

25807503968 is an abundant number, since it is smaller than the sum of its proper divisors (26640006112).

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

25807503968 is a wasteful number, since it uses less digits than its factorization.

25807503968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26015670 (or 26015662 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 25807503968 in words is "twenty-five billion, eight hundred seven million, five hundred three thousand, nine hundred sixty-eight".