91983626865291 has 16 divisors (see below), whose sum is σ = 140315116358144. Its totient is φ = 52505976354624.

The previous prime is 91983626865233. The next prime is 91983626865293. The reversal of 91983626865291 is 19256862638919.

It is not a de Polignac number, because 91983626865291 - 2¹⁵ = 91983626832523 is a prime.

It is a super-2 number, since 2×91983626865291² (a number of 29 digits) contains 22 as substring.

It is the 9590810-th Hogben number.

It is not an unprimeable number, because it can be changed into a prime (91983626865293) by changing a digit.

It is a nontrivial repunit in base 9590809.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2337319015 + ... + 2337358368.

It is an arithmetic number, because the mean of its divisors is an integer number (8769694772384).

Almost surely, 2^{91983626865291} is an apocalyptic number.

91983626865291 is a deficient number, since it is larger than the sum of its proper divisors (48331489492853).

91983626865291 is a wasteful number, since it uses less digits than its factorization.

91983626865291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674678330.

The product of its digits is 604661760, while the sum is 75.

The spelling of 91983626865291 in words is "ninety-one trillion, nine hundred eighty-three billion, six hundred twenty-six million, eight hundred sixty-five thousand, two hundred ninety-one".