461656817257 has 2 divisors, whose sum is σ = 461656817258. Its totient is φ = 461656817256.

The previous prime is 461656817189. The next prime is 461656817269. The reversal of 461656817257 is 752718656164.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299888759641 + 161768057616 = 547621^2 + 402204^2 .

It is a cyclic number.

It is not a de Polignac number, because 461656817257 - 2²³ = 461648428649 is a prime.

It is not a weakly prime, because it can be changed into another prime (461656917257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230828408628 + 230828408629.

It is an arithmetic number, because the mean of its divisors is an integer number (230828408629).

Almost surely, 2^461656817257 is an apocalyptic number.

It is an amenable number.

461656817257 is a deficient number, since it is larger than the sum of its proper divisors (1).

461656817257 is an equidigital number, since it uses as much as digits as its factorization.

461656817257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16934400, while the sum is 58.

The spelling of 461656817257 in words is "four hundred sixty-one billion, six hundred fifty-six million, eight hundred seventeen thousand, two hundred fifty-seven".