6521130904 has 64 divisors (see below), whose sum is σ = 13096800000. Its totient is φ = 3034931328.

The previous prime is 6521130877. The next prime is 6521130989. The reversal of 6521130904 is 4090311256.

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, 6099682 + ... + 6100750.

It is an arithmetic number, because the mean of its divisors is an integer number (204637500).

Almost surely, 2^6521130904 is an apocalyptic number.

It is an amenable number.

6521130904 is an abundant number, since it is smaller than the sum of its proper divisors (6575669096).

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

6521130904 is a wasteful number, since it uses less digits than its factorization.

6521130904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760 (or 1756 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 6521130904 is about 80753.5194527149. The cubic root of 6521130904 is about 1868.2757327967.

The spelling of 6521130904 in words is "six billion, five hundred twenty-one million, one hundred thirty thousand, nine hundred four".