25978076688 has 20 divisors (see below), whose sum is σ = 67110031568. Its totient is φ = 8659358880.

The previous prime is 25978076681. The next prime is 25978076759. The reversal of 25978076688 is 88667087952.

It is not an unprimeable number, because it can be changed into a prime (25978076681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270604918 + ... + 270605013.

Almost surely, 2^25978076688 is an apocalyptic number.

It is an amenable number.

25978076688 is an abundant number, since it is smaller than the sum of its proper divisors (41131954880).

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

25978076688 is a wasteful number, since it uses less digits than its factorization.

25978076688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541209942 (or 541209936 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 66.

The spelling of 25978076688 in words is "twenty-five billion, nine hundred seventy-eight million, seventy-six thousand, six hundred eighty-eight".