25420173648 has 60 divisors (see below), whose sum is σ = 68011414848. Its totient is φ = 8181192320.

The previous prime is 25420173629. The next prime is 25420173679. The reversal of 25420173648 is 84637102452.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274488 + ... + 355223.

Almost surely, 2^25420173648 is an apocalyptic number.

It is an amenable number.

25420173648 is an abundant number, since it is smaller than the sum of its proper divisors (42591241200).

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

25420173648 is a wasteful number, since it uses less digits than its factorization.

25420173648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629780 (or 629745 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 25420173648 in words is "twenty-five billion, four hundred twenty million, one hundred seventy-three thousand, six hundred forty-eight".