6520130464 has 12 divisors (see below), whose sum is σ = 12836506914. Its totient is φ = 3260065216.

The previous prime is 6520130443. The next prime is 6520130471. The reversal of 6520130464 is 4640310256.

It can be written as a sum of positive squares in only one way, i.e., 5228446864 + 1291683600 = 72308^2 + 35940^2 .

It is a super-3 number, since 3×6520130464³ (a number of 30 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101877007 + ... + 101877070.

Almost surely, 2^6520130464 is an apocalyptic number.

It is an amenable number.

6520130464 is a deficient number, since it is larger than the sum of its proper divisors (6316376450).

6520130464 is a wasteful number, since it uses less digits than its factorization.

6520130464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203754087 (or 203754079 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 6520130464 is about 80747.3248101756. The cubic root of 6520130464 is about 1868.1801873362.

The spelling of 6520130464 in words is "six billion, five hundred twenty million, one hundred thirty thousand, four hundred sixty-four".