25977057864 has 32 divisors (see below), whose sum is σ = 67182048000. Its totient is φ = 8360432192.

The previous prime is 25977057863. The next prime is 25977057871. The reversal of 25977057864 is 46875077952.

It is a junction number, because it is equal to n+sod(n) for n = 25977057798 and 25977057807.

It is not an unprimeable number, because it can be changed into a prime (25977057863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18660984 + ... + 18662375.

It is an arithmetic number, because the mean of its divisors is an integer number (2099439000).

Almost surely, 2^25977057864 is an apocalyptic number.

25977057864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25977057864 is an abundant number, since it is smaller than the sum of its proper divisors (41204990136).

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

25977057864 is a wasteful number, since it uses less digits than its factorization.

25977057864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37323397 (or 37323393 counting only the distinct ones).

The product of its (nonzero) digits is 29635200, while the sum is 60.

The spelling of 25977057864 in words is "twenty-five billion, nine hundred seventy-seven million, fifty-seven thousand, eight hundred sixty-four".