91975686046 has 4 divisors (see below), whose sum is σ = 137963529072. Its totient is φ = 45987843022.

The previous prime is 91975686031. The next prime is 91975686071. The reversal of 91975686046 is 64068657919.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×91975686046² (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 as a sum of consecutive naturals, namely, 22993921510 + ... + 22993921513.

It is an arithmetic number, because the mean of its divisors is an integer number (34490882268).

Almost surely, 2^91975686046 is an apocalyptic number.

91975686046 is a deficient number, since it is larger than the sum of its proper divisors (45987843026).

91975686046 is a wasteful number, since it uses less digits than its factorization.

91975686046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45987843025.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 91975686046 in words is "ninety-one billion, nine hundred seventy-five million, six hundred eighty-six thousand, forty-six".