91859110079 has 8 divisors (see below), whose sum is σ = 101038121040. Its totient is φ = 83508280680.

The previous prime is 91859110067. The next prime is 91859110081. The reversal of 91859110079 is 97001195819.

It is not a de Polignac number, because 91859110079 - 2³⁶ = 23139633343 is a prime.

It is a super-2 number, since 2×91859110079² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91859113079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34506224 + ... + 34508885.

It is an arithmetic number, because the mean of its divisors is an integer number (12629765130).

Almost surely, 2^91859110079 is an apocalyptic number.

91859110079 is a deficient number, since it is larger than the sum of its proper divisors (9179010961).

91859110079 is an equidigital number, since it uses as much as digits as its factorization.

91859110079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69015142 (or 69015120 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 50.

The spelling of 91859110079 in words is "ninety-one billion, eight hundred fifty-nine million, one hundred ten thousand, seventy-nine".