91618305059 has 4 divisors (see below), whose sum is σ = 94094475504. Its totient is φ = 89142134616.

The previous prime is 91618305011. The next prime is 91618305089. The reversal of 91618305059 is 95050381619.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91618305059 - 2²⁰ = 91617256483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91618305089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238085167 + ... + 1238085240.

It is an arithmetic number, because the mean of its divisors is an integer number (23523618876).

Almost surely, 2^91618305059 is an apocalyptic number.

91618305059 is a deficient number, since it is larger than the sum of its proper divisors (2476170445).

91618305059 is a wasteful number, since it uses less digits than its factorization.

91618305059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476170444.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 91618305059 in words is "ninety-one billion, six hundred eighteen million, three hundred five thousand, fifty-nine".