656461242653 has 2 divisors, whose sum is σ = 656461242654. Its totient is φ = 656461242652.

The previous prime is 656461242637. The next prime is 656461242673. The reversal of 656461242653 is 356242164656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637758765604 + 18702477049 = 798598^2 + 136757^2 .

It is a cyclic number.

It is not a de Polignac number, because 656461242653 - 2⁴ = 656461242637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656461242673) 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 as a sum of consecutive naturals, namely, 328230621326 + 328230621327.

It is an arithmetic number, because the mean of its divisors is an integer number (328230621327).

Almost surely, 2^656461242653 is an apocalyptic number.

It is an amenable number.

656461242653 is a deficient number, since it is larger than the sum of its proper divisors (1).

656461242653 is an equidigital number, since it uses as much as digits as its factorization.

656461242653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6220800, while the sum is 50.

The spelling of 656461242653 in words is "six hundred fifty-six billion, four hundred sixty-one million, two hundred forty-two thousand, six hundred fifty-three".