91618359355089 has 16 divisors (see below), whose sum is σ = 155121031712640. Its totient is φ = 52353348202800.

The previous prime is 91618359355021. The next prime is 91618359355153. The reversal of 91618359355089 is 98055395381619.

91618359355089 is a `hidden beast` number, since 9 + 1 + 6 + 1 + 83 + 5 + 9 + 35 + 508 + 9 = 666.

It is not a de Polignac number, because 91618359355089 - 2¹² = 91618359350993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91618359355889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242376611862 + ... + 242376612239.

It is an arithmetic number, because the mean of its divisors is an integer number (9695064482040).

Almost surely, 2^{91618359355089} is an apocalyptic number.

It is an amenable number.

91618359355089 is a deficient number, since it is larger than the sum of its proper divisors (63502672357551).

91618359355089 is a wasteful number, since it uses less digits than its factorization.

91618359355089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484753224117 (or 484753224111 counting only the distinct ones).

The product of its (nonzero) digits is 314928000, while the sum is 72.

The spelling of 91618359355089 in words is "ninety-one trillion, six hundred eighteen billion, three hundred fifty-nine million, three hundred fifty-five thousand, eighty-nine".