25250025780 has 96 divisors (see below), whose sum is σ = 89777882880. Its totient is φ = 5771433600.

The previous prime is 25250025769. The next prime is 25250025781. The reversal of 25250025780 is 8752005252.

25250025780 is a `hidden beast` number, since 2 + 52 + 500 + 25 + 7 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25250025781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3336171 + ... + 3343730.

It is an arithmetic number, because the mean of its divisors is an integer number (935186280).

Almost surely, 2^25250025780 is an apocalyptic number.

25250025780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25250025780 is an abundant number, since it is smaller than the sum of its proper divisors (64527857100).

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

25250025780 is a wasteful number, since it uses less digits than its factorization.

25250025780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6679926 (or 6679918 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The spelling of 25250025780 in words is "twenty-five billion, two hundred fifty million, twenty-five thousand, seven hundred eighty".