2521405672 has 16 divisors (see below), whose sum is σ = 4728664800. Its totient is φ = 1260428400.

The previous prime is 2521405661. The next prime is 2521405687. The reversal of 2521405672 is 2765041252.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7779 + ... + 71437.

It is an arithmetic number, because the mean of its divisors is an integer number (295541550).

Almost surely, 2^2521405672 is an apocalyptic number.

It is an amenable number.

2521405672 is a deficient number, since it is larger than the sum of its proper divisors (2207259128).

2521405672 is a wasteful number, since it uses less digits than its factorization.

2521405672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68616 (or 68612 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 2521405672 is about 50213.6004683990. The cubic root of 2521405672 is about 1361.0714005446.

The spelling of 2521405672 in words is "two billion, five hundred twenty-one million, four hundred five thousand, six hundred seventy-two".