25920415980 has 72 divisors (see below), whose sum is σ = 82763444400. Its totient is φ = 6548314752.

The previous prime is 25920415957. The next prime is 25920416023. The reversal of 25920415980 is 8951402952.

It is a happy number.

25920415980 is a `hidden beast` number, since 2 + 59 + 2 + 0 + 4 + 1 + 598 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3786115 + ... + 3792954.

Almost surely, 2^25920415980 is an apocalyptic number.

25920415980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25920415980 is an abundant number, since it is smaller than the sum of its proper divisors (56843028420).

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

25920415980 is a wasteful number, since it uses less digits than its factorization.

25920415980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7579103 (or 7579098 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 25920415980 in words is "twenty-five billion, nine hundred twenty million, four hundred fifteen thousand, nine hundred eighty".