517715657423 has 2 divisors, whose sum is σ = 517715657424. Its totient is φ = 517715657422.

The previous prime is 517715657413. The next prime is 517715657507. The reversal of 517715657423 is 324756517715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 517715657423 - 2⁶ = 517715657359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517715657413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258857828711 + 258857828712.

It is an arithmetic number, because the mean of its divisors is an integer number (258857828712).

Almost surely, 2^517715657423 is an apocalyptic number.

517715657423 is a deficient number, since it is larger than the sum of its proper divisors (1).

517715657423 is an equidigital number, since it uses as much as digits as its factorization.

517715657423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6174000, while the sum is 53.

The spelling of 517715657423 in words is "five hundred seventeen billion, seven hundred fifteen million, six hundred fifty-seven thousand, four hundred twenty-three".