91686705424 has 40 divisors (see below), whose sum is σ = 177953110272. Its totient is φ = 45763411200.

The previous prime is 91686705419. The next prime is 91686705433. The reversal of 91686705424 is 42450768619.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38997849 + ... + 39000199.

Almost surely, 2^91686705424 is an apocalyptic number.

It is an amenable number.

91686705424 is a deficient number, since it is larger than the sum of its proper divisors (86266404848).

91686705424 is a wasteful number, since it uses less digits than its factorization.

91686705424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5575 (or 5569 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 91686705424 in words is "ninety-one billion, six hundred eighty-six million, seven hundred five thousand, four hundred twenty-four".