25012978800 has 60 divisors (see below), whose sum is σ = 80124912600. Its totient is φ = 6670127360.

The previous prime is 25012978789. The next prime is 25012978843. The reversal of 25012978800 is 887921052.

It is a tau number, because it is divible by the number of its divisors (60).

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10420875 + ... + 10423274.

It is an arithmetic number, because the mean of its divisors is an integer number (1335415210).

Almost surely, 2^25012978800 is an apocalyptic number.

25012978800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25012978800 is an abundant number, since it is smaller than the sum of its proper divisors (55111933800).

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

25012978800 is a wasteful number, since it uses less digits than its factorization.

25012978800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20844170 (or 20844159 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 25012978800 in words is "twenty-five billion, twelve million, nine hundred seventy-eight thousand, eight hundred".