656516005643 has 2 divisors, whose sum is σ = 656516005644. Its totient is φ = 656516005642.

The previous prime is 656516005627. The next prime is 656516005679. The reversal of 656516005643 is 346500615656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656516005643 - 2⁴ = 656516005627 is a prime.

It is not a weakly prime, because it can be changed into another prime (656516005043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328258002821 + 328258002822.

It is an arithmetic number, because the mean of its divisors is an integer number (328258002822).

Almost surely, 2^656516005643 is an apocalyptic number.

656516005643 is a deficient number, since it is larger than the sum of its proper divisors (1).

656516005643 is an equidigital number, since it uses as much as digits as its factorization.

656516005643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 656516005643 in words is "six hundred fifty-six billion, five hundred sixteen million, five thousand, six hundred forty-three".