91688369877 has 64 divisors (see below), whose sum is σ = 147438144000. Its totient is φ = 56312822592.

The previous prime is 91688369869. The next prime is 91688369897. The reversal of 91688369877 is 77896388619.

It is not a de Polignac number, because 91688369877 - 2³ = 91688369869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91688369837) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38378199 + ... + 38380587.

It is an arithmetic number, because the mean of its divisors is an integer number (2303721000).

Almost surely, 2^91688369877 is an apocalyptic number.

It is an amenable number.

91688369877 is a deficient number, since it is larger than the sum of its proper divisors (55749774123).

91688369877 is a wasteful number, since it uses less digits than its factorization.

91688369877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084 (or 3052 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 72.

The spelling of 91688369877 in words is "ninety-one billion, six hundred eighty-eight million, three hundred sixty-nine thousand, eight hundred seventy-seven".