91789958936 has 32 divisors (see below), whose sum is σ = 185358709200. Its totient is φ = 42361488000.

The previous prime is 91789958867. The next prime is 91789958947. The reversal of 91789958936 is 63985998719.

It is a super-2 number, since 2×91789958936² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2005475 + ... + 2050733.

Almost surely, 2^91789958936 is an apocalyptic number.

It is an amenable number.

91789958936 is an abundant number, since it is smaller than the sum of its proper divisors (93568750264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91789958936 is a wasteful number, since it uses less digits than its factorization.

91789958936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64779 (or 64775 counting only the distinct ones).

The product of its digits is 264539520, while the sum is 74.

The spelling of 91789958936 in words is "ninety-one billion, seven hundred eighty-nine million, nine hundred fifty-eight thousand, nine hundred thirty-six".