91789958959 has 8 divisors (see below), whose sum is σ = 92180278080. Its totient is φ = 91399718400.

The previous prime is 91789958951. The next prime is 91789958977. The reversal of 91789958959 is 95985998719.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91789958959 - 2³ = 91789958951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91789958951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4598202 + ... + 4618120.

It is an arithmetic number, because the mean of its divisors is an integer number (11522534760).

Almost surely, 2^91789958959 is an apocalyptic number.

91789958959 is a deficient number, since it is larger than the sum of its proper divisors (390319121).

91789958959 is a wasteful number, since it uses less digits than its factorization.

91789958959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39281.

The product of its digits is 661348800, while the sum is 79.

The spelling of 91789958959 in words is "ninety-one billion, seven hundred eighty-nine million, nine hundred fifty-eight thousand, nine hundred fifty-nine".