91928372107 has 16 divisors (see below), whose sum is σ = 108011540448. Its totient is φ = 77134279680.

The previous prime is 91928372099. The next prime is 91928372153. The reversal of 91928372107 is 70127382919.

It is a cyclic number.

It is not a de Polignac number, because 91928372107 - 2³ = 91928372099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91928373107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1522363 + ... + 1581595.

It is an arithmetic number, because the mean of its divisors is an integer number (6750721278).

Almost surely, 2^91928372107 is an apocalyptic number.

91928372107 is a deficient number, since it is larger than the sum of its proper divisors (16083168341).

91928372107 is a wasteful number, since it uses less digits than its factorization.

91928372107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70110.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 91928372107 in words is "ninety-one billion, nine hundred twenty-eight million, three hundred seventy-two thousand, one hundred seven".