656116566515 has 4 divisors (see below), whose sum is σ = 787339879824. Its totient is φ = 524893253208.

The previous prime is 656116566503. The next prime is 656116566563. The reversal of 656116566515 is 515665611656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 656116566515 - 2¹⁶ = 656116500979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65611656647 + ... + 65611656656.

It is an arithmetic number, because the mean of its divisors is an integer number (196834969956).

Almost surely, 2^656116566515 is an apocalyptic number.

656116566515 is a deficient number, since it is larger than the sum of its proper divisors (131223313309).

656116566515 is a wasteful number, since it uses less digits than its factorization.

656116566515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131223313308.

The product of its digits is 4860000, while the sum is 53.

The spelling of 656116566515 in words is "six hundred fifty-six billion, one hundred sixteen million, five hundred sixty-six thousand, five hundred fifteen".