2521756680 has 32 divisors (see below), whose sum is σ = 7565270400. Its totient is φ = 672468416.

The previous prime is 2521756667. The next prime is 2521756691. The reversal of 2521756680 is 866571252.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10507200 + ... + 10507439.

It is an arithmetic number, because the mean of its divisors is an integer number (236414700).

Almost surely, 2^2521756680 is an apocalyptic number.

2521756680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2521756680 is an abundant number, since it is smaller than the sum of its proper divisors (5043513720).

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

2521756680 is a wasteful number, since it uses less digits than its factorization.

2521756680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21014653 (or 21014649 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 2521756680 is about 50217.0954954585. The cubic root of 2521756680 is about 1361.1345564246.

The spelling of 2521756680 in words is "two billion, five hundred twenty-one million, seven hundred fifty-six thousand, six hundred eighty".