82515956317 has 2 divisors, whose sum is σ = 82515956318. Its totient is φ = 82515956316.

The previous prime is 82515956291. The next prime is 82515956321. The reversal of 82515956317 is 71365951528.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81605063556 + 910892761 = 285666^2 + 30181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82515956317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82515956717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41257978158 + 41257978159.

It is an arithmetic number, because the mean of its divisors is an integer number (41257978159).

Almost surely, 2^82515956317 is an apocalyptic number.

It is an amenable number.

82515956317 is a deficient number, since it is larger than the sum of its proper divisors (1).

82515956317 is an equidigital number, since it uses as much as digits as its factorization.

82515956317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268000, while the sum is 52.

The spelling of 82515956317 in words is "eighty-two billion, five hundred fifteen million, nine hundred fifty-six thousand, three hundred seventeen".