656455554617 has 2 divisors, whose sum is σ = 656455554618. Its totient is φ = 656455554616.

The previous prime is 656455554541. The next prime is 656455554691. The reversal of 656455554617 is 716455554656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 484665200041 + 171790354576 = 696179^2 + 414476^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656455554617 is a prime.

It is not a weakly prime, because it can be changed into another prime (656455554697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328227777308 + 328227777309.

It is an arithmetic number, because the mean of its divisors is an integer number (328227777309).

Almost surely, 2^656455554617 is an apocalyptic number.

It is an amenable number.

656455554617 is a deficient number, since it is larger than the sum of its proper divisors (1).

656455554617 is an equidigital number, since it uses as much as digits as its factorization.

656455554617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600000, while the sum is 59.

The spelling of 656455554617 in words is "six hundred fifty-six billion, four hundred fifty-five million, five hundred fifty-four thousand, six hundred seventeen".