817987510537 has 2 divisors, whose sum is σ = 817987510538. Its totient is φ = 817987510536.

The previous prime is 817987510463. The next prime is 817987510547. The reversal of 817987510537 is 735015789718.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 808810636921 + 9176873616 = 899339^2 + 95796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-817987510537 is a prime.

It is not a weakly prime, because it can be changed into another prime (817987510547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408993755268 + 408993755269.

It is an arithmetic number, because the mean of its divisors is an integer number (408993755269).

Almost surely, 2^817987510537 is an apocalyptic number.

It is an amenable number.

817987510537 is a deficient number, since it is larger than the sum of its proper divisors (1).

817987510537 is an equidigital number, since it uses as much as digits as its factorization.

817987510537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14817600, while the sum is 61.

The spelling of 817987510537 in words is "eight hundred seventeen billion, nine hundred eighty-seven million, five hundred ten thousand, five hundred thirty-seven".