91506830620 has 48 divisors (see below), whose sum is σ = 202327725600. Its totient is φ = 34667792640.

The previous prime is 91506830603. The next prime is 91506830633. The reversal of 91506830620 is 2603860519.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1652746 + ... + 1707214.

It is an arithmetic number, because the mean of its divisors is an integer number (4215160950).

Almost surely, 2^91506830620 is an apocalyptic number.

It is an amenable number.

91506830620 is an abundant number, since it is smaller than the sum of its proper divisors (110820894980).

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

91506830620 is a wasteful number, since it uses less digits than its factorization.

91506830620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58918 (or 58916 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 91506830620 in words is "ninety-one billion, five hundred six million, eight hundred thirty thousand, six hundred twenty".