82515956291 has 2 divisors, whose sum is σ = 82515956292. Its totient is φ = 82515956290.

The previous prime is 82515956269. The next prime is 82515956317. The reversal of 82515956291 is 19265951528.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82515956291 is a prime.

It is not a weakly prime, because it can be changed into another prime (82515956231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41257978145 + 41257978146.

It is an arithmetic number, because the mean of its divisors is an integer number (41257978146).

Almost surely, 2^82515956291 is an apocalyptic number.

82515956291 is a deficient number, since it is larger than the sum of its proper divisors (1).

82515956291 is an equidigital number, since it uses as much as digits as its factorization.

82515956291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944000, while the sum is 53.

The spelling of 82515956291 in words is "eighty-two billion, five hundred fifteen million, nine hundred fifty-six thousand, two hundred ninety-one".