91755005569 has 2 divisors, whose sum is σ = 91755005570. Its totient is φ = 91755005568.

The previous prime is 91755005549. The next prime is 91755005579. The reversal of 91755005569 is 96550055719.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91634554944 + 120450625 = 302712^2 + 10975^2 .

It is a cyclic number.

It is not a de Polignac number, because 91755005569 - 2²⁵ = 91721451137 is a prime.

It is a super-2 number, since 2×91755005569² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91755005519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45877502784 + 45877502785.

It is an arithmetic number, because the mean of its divisors is an integer number (45877502785).

Almost surely, 2^91755005569 is an apocalyptic number.

It is an amenable number.

91755005569 is a deficient number, since it is larger than the sum of its proper divisors (1).

91755005569 is an equidigital number, since it uses as much as digits as its factorization.

91755005569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2126250, while the sum is 52.

The spelling of 91755005569 in words is "ninety-one billion, seven hundred fifty-five million, five thousand, five hundred sixty-nine".