91259913709 has 8 divisors (see below), whose sum is σ = 92139389568. Its totient is φ = 90383530080.

The previous prime is 91259913697. The next prime is 91259913713. The reversal of 91259913709 is 90731995219.

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 91259913709 - 2²⁷ = 91125695981 is a prime.

It is a super-2 number, since 2×91259913709² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91259913709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91259913749) 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, 713727 + ... + 831820.

It is an arithmetic number, because the mean of its divisors is an integer number (11517423696).

Almost surely, 2^91259913709 is an apocalyptic number.

It is an amenable number.

91259913709 is a deficient number, since it is larger than the sum of its proper divisors (879475859).

91259913709 is a wasteful number, since it uses less digits than its factorization.

91259913709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546115.

The product of its (nonzero) digits is 1377810, while the sum is 55.

The spelling of 91259913709 in words is "ninety-one billion, two hundred fifty-nine million, nine hundred thirteen thousand, seven hundred nine".