6516611564 has 24 divisors (see below), whose sum is σ = 12710421360. Its totient is φ = 2905238016.

The previous prime is 6516611561. The next prime is 6516611567. The reversal of 6516611564 is 4651166156.

It is an interprime number because it is at equal distance from previous prime (6516611561) and next prime (6516611567).

It is not an unprimeable number, because it can be changed into a prime (6516611561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2520617 + ... + 2523200.

It is an arithmetic number, because the mean of its divisors is an integer number (529600890).

Almost surely, 2^6516611564 is an apocalyptic number.

It is an amenable number.

6516611564 is a deficient number, since it is larger than the sum of its proper divisors (6193809796).

6516611564 is a wasteful number, since it uses less digits than its factorization.

6516611564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043857 (or 5043855 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 6516611564 is about 80725.5322930732. The cubic root of 6516611564 is about 1867.8440426175.

The spelling of 6516611564 in words is "six billion, five hundred sixteen million, six hundred eleven thousand, five hundred sixty-four".