91938216698 has 32 divisors (see below), whose sum is σ = 148099176576. Its totient is φ = 42649486848.

The previous prime is 91938216683. The next prime is 91938216757. The reversal of 91938216698 is 89661283919.

It is a self number, because there is not a number n which added to its sum of digits gives 91938216698.

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, 5161115 + ... + 5178897.

It is an arithmetic number, because the mean of its divisors is an integer number (4628099268).

Almost surely, 2^91938216698 is an apocalyptic number.

91938216698 is a deficient number, since it is larger than the sum of its proper divisors (56160959878).

91938216698 is a wasteful number, since it uses less digits than its factorization.

91938216698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19958.

The product of its digits is 10077696, while the sum is 62.

The spelling of 91938216698 in words is "ninety-one billion, nine hundred thirty-eight million, two hundred sixteen thousand, six hundred ninety-eight".