6511117664 has 12 divisors (see below), whose sum is σ = 12818762964. Its totient is φ = 3255558816.

The previous prime is 6511117637. The next prime is 6511117667. The reversal of 6511117664 is 4667111156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6511117667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101736182 + ... + 101736245.

It is an arithmetic number, because the mean of its divisors is an integer number (1068230247).

Almost surely, 2^6511117664 is an apocalyptic number.

It is an amenable number.

6511117664 is a deficient number, since it is larger than the sum of its proper divisors (6307645300).

6511117664 is a wasteful number, since it uses less digits than its factorization.

6511117664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203472437 (or 203472429 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 6511117664 is about 80691.4968506595. The cubic root of 6511117664 is about 1867.3189929862.

The spelling of 6511117664 in words is "six billion, five hundred eleven million, one hundred seventeen thousand, six hundred sixty-four".