2501978520 has 64 divisors (see below), whose sum is σ = 7900992000. Its totient is φ = 632078208.

The previous prime is 2501978489. The next prime is 2501978543. The reversal of 2501978520 is 258791052.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546400 + ... + 550959.

It is an arithmetic number, because the mean of its divisors is an integer number (123453000).

Almost surely, 2^2501978520 is an apocalyptic number.

2501978520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2501978520 is an abundant number, since it is smaller than the sum of its proper divisors (5399013480).

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

2501978520 is a wasteful number, since it uses less digits than its factorization.

2501978520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097392 (or 1097388 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 2501978520 is about 50019.7812870068. The cubic root of 2501978520 is about 1357.5667491911.

The spelling of 2501978520 in words is "two billion, five hundred one million, nine hundred seventy-eight thousand, five hundred twenty".