91618902216443 has 32 divisors (see below), whose sum is σ = 107407730798592. Its totient is φ = 76532264726400.

The previous prime is 91618902216431. The next prime is 91618902216449. The reversal of 91618902216443 is 34461220981619.

It is not a de Polignac number, because 91618902216443 - 2²⁴ = 91618885439227 is a prime.

It is a super-2 number, since 2×91618902216443² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91618902216449) 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, 17811605 + ... + 22371657.

It is an arithmetic number, because the mean of its divisors is an integer number (3356491587456).

Almost surely, 2^{91618902216443} is an apocalyptic number.

91618902216443 is a deficient number, since it is larger than the sum of its proper divisors (15788828582149).

91618902216443 is a wasteful number, since it uses less digits than its factorization.

91618902216443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560555.

The product of its (nonzero) digits is 4478976, while the sum is 56.

The spelling of 91618902216443 in words is "ninety-one trillion, six hundred eighteen billion, nine hundred two million, two hundred sixteen thousand, four hundred forty-three".