91928372108 has 12 divisors (see below), whose sum is σ = 160914628392. Its totient is φ = 45952764000.

The previous prime is 91928372099. The next prime is 91928372153. The reversal of 91928372108 is 80127382919.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2837393 + ... + 2869608.

It is an arithmetic number, because the mean of its divisors is an integer number (13409552366).

Almost surely, 2^91928372108 is an apocalyptic number.

It is an amenable number.

91928372108 is a deficient number, since it is larger than the sum of its proper divisors (68986256284).

91928372108 is a wasteful number, since it uses less digits than its factorization.

91928372108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711032 (or 5711030 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 91928372108 in words is "ninety-one billion, nine hundred twenty-eight million, three hundred seventy-two thousand, one hundred eight".