91402056022517 has 2 divisors, whose sum is σ = 91402056022518. Its totient is φ = 91402056022516.

The previous prime is 91402056022499. The next prime is 91402056022547. The reversal of 91402056022517 is 71522065020419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57486329736676 + 33915726285841 = 7581974^2 + 5823721^2 .

It is a cyclic number.

It is not a de Polignac number, because 91402056022517 - 2¹² = 91402056018421 is a prime.

It is a super-2 number, since 2×91402056022517² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91402056022547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45701028011258 + 45701028011259.

It is an arithmetic number, because the mean of its divisors is an integer number (45701028011259).

Almost surely, 2^{91402056022517} is an apocalyptic number.

It is an amenable number.

91402056022517 is a deficient number, since it is larger than the sum of its proper divisors (1).

91402056022517 is an equidigital number, since it uses as much as digits as its factorization.

91402056022517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 91402056022517 in words is "ninety-one trillion, four hundred two billion, fifty-six million, twenty-two thousand, five hundred seventeen".