25555585025680 has 160 divisors (see below), whose sum is σ = 60419432908800. Its totient is φ = 10051231088640.

The previous prime is 25555585025671. The next prime is 25555585025699. The reversal of 25555585025680 is 8652058555552.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1225735896 + ... + 1225756744.

It is an arithmetic number, because the mean of its divisors is an integer number (377621455680).

Almost surely, 2^{25555585025680} is an apocalyptic number.

25555585025680 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 25555585025680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30209716454400).

25555585025680 is an abundant number, since it is smaller than the sum of its proper divisors (34863847883120).

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

25555585025680 is a wasteful number, since it uses less digits than its factorization.

25555585025680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21977 (or 21971 counting only the distinct ones).

The product of its (nonzero) digits is 120000000, while the sum is 61.

The spelling of 25555585025680 in words is "twenty-five trillion, five hundred fifty-five billion, five hundred eighty-five million, twenty-five thousand, six hundred eighty".