817987510463 has 2 divisors, whose sum is σ = 817987510464. Its totient is φ = 817987510462.

The previous prime is 817987510399. The next prime is 817987510537. The reversal of 817987510463 is 364015789718.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 817987510463 - 2⁶ = 817987510399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (817987519463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408993755231 + 408993755232.

It is an arithmetic number, because the mean of its divisors is an integer number (408993755232).

Almost surely, 2^817987510463 is an apocalyptic number.

817987510463 is a deficient number, since it is larger than the sum of its proper divisors (1).

817987510463 is an equidigital number, since it uses as much as digits as its factorization.

817987510463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 817987510463 in words is "eight hundred seventeen billion, nine hundred eighty-seven million, five hundred ten thousand, four hundred sixty-three".