91791026071 has 8 divisors (see below), whose sum is σ = 98871681024. Its totient is φ = 84967849560.

The previous prime is 91791026039. The next prime is 91791026081. The reversal of 91791026071 is 17062019719.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91791026071 - 2⁵ = 91791026039 is a prime.

It is a super-3 number, since 3×91791026071³ (a number of 34 digits) contains 333 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 (91791026081) 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, 64368871 + ... + 64370296.

It is an arithmetic number, because the mean of its divisors is an integer number (12358960128).

Almost surely, 2^91791026071 is an apocalyptic number.

91791026071 is a deficient number, since it is larger than the sum of its proper divisors (7080654953).

91791026071 is a wasteful number, since it uses less digits than its factorization.

91791026071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128739221.

The product of its (nonzero) digits is 47628, while the sum is 43.

The spelling of 91791026071 in words is "ninety-one billion, seven hundred ninety-one million, twenty-six thousand, seventy-one".