6515580984 has 128 divisors (see below), whose sum is σ = 18127411200. Its totient is φ = 1934898560.

The previous prime is 6515580881. The next prime is 6515581019. The reversal of 6515580984 is 4890855156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8768917 + ... + 8769659.

It is an arithmetic number, because the mean of its divisors is an integer number (141620400).

Almost surely, 2^6515580984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6515580984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9063705600).

6515580984 is an abundant number, since it is smaller than the sum of its proper divisors (11611830216).

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

6515580984 is a wasteful number, since it uses less digits than its factorization.

6515580984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1381 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 51.

The square root of 6515580984 is about 80719.1488062157. The cubic root of 6515580984 is about 1867.7455730279.

The spelling of 6515580984 in words is "six billion, five hundred fifteen million, five hundred eighty thousand, nine hundred eighty-four".