25385978880 has 176 divisors, whose sum is σ = 90217676640. Its totient is φ = 6769557504.

The previous prime is 25385978857. The next prime is 25385978921. The reversal of 25385978880 is 8887958352.

25385978880 is a `hidden beast` number, since 2 + 5 + 38 + 597 + 8 + 8 + 8 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46422 + ... + 230058.

Almost surely, 2^25385978880 is an apocalyptic number.

25385978880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25385978880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45108838320).

25385978880 is an abundant number, since it is smaller than the sum of its proper divisors (64831697760).

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

25385978880 is a wasteful number, since it uses less digits than its factorization.

25385978880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183671 (or 183647 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 63.

The spelling of 25385978880 in words is "twenty-five billion, three hundred eighty-five million, nine hundred seventy-eight thousand, eight hundred eighty".