91591456319 has 32 divisors (see below), whose sum is σ = 102896801280. Its totient is φ = 80805542400.

The previous prime is 91591456309. The next prime is 91591456321. The reversal of 91591456319 is 91365419519.

It is not a de Polignac number, because 91591456319 - 2⁴ = 91591456303 is a prime.

It is a super-2 number, since 2×91591456319² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91591456309) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125985134 + ... + 125985860.

It is an arithmetic number, because the mean of its divisors is an integer number (3215525040).

Almost surely, 2^91591456319 is an apocalyptic number.

91591456319 is a deficient number, since it is larger than the sum of its proper divisors (11305344961).

91591456319 is a wasteful number, since it uses less digits than its factorization.

91591456319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871.

The product of its digits is 1312200, while the sum is 53.

The spelling of 91591456319 in words is "ninety-one billion, five hundred ninety-one million, four hundred fifty-six thousand, three hundred nineteen".