91495689639766 has 8 divisors (see below), whose sum is σ = 139569696060840. Its totient is φ = 44972457619488.

The previous prime is 91495689639763. The next prime is 91495689639797. The reversal of 91495689639766 is 66793698659419.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×91495689639766² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91495689639763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387693600051 + ... + 387693600286.

It is an arithmetic number, because the mean of its divisors is an integer number (17446212007605).

Almost surely, 2^{91495689639766} is an apocalyptic number.

91495689639766 is a deficient number, since it is larger than the sum of its proper divisors (48074006421074).

91495689639766 is a wasteful number, since it uses less digits than its factorization.

91495689639766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775387200398.

The product of its digits is 28570268160, while the sum is 88.

The spelling of 91495689639766 in words is "ninety-one trillion, four hundred ninety-five billion, six hundred eighty-nine million, six hundred thirty-nine thousand, seven hundred sixty-six".