91149865695 has 24 divisors (see below), whose sum is σ = 180563544096. Its totient is φ = 41668509888.

The previous prime is 91149865679. The next prime is 91149865757. The reversal of 91149865695 is 59656894119.

91149865695 is a `hidden beast` number, since 9 + 1 + 1 + 498 + 6 + 56 + 95 = 666.

It is not a de Polignac number, because 91149865695 - 2⁴ = 91149865679 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144682012 + ... + 144682641.

It is an arithmetic number, because the mean of its divisors is an integer number (7523481004).

Almost surely, 2^91149865695 is an apocalyptic number.

91149865695 is a deficient number, since it is larger than the sum of its proper divisors (89413678401).

91149865695 is a wasteful number, since it uses less digits than its factorization.

91149865695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289364671 (or 289364668 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 63.

The spelling of 91149865695 in words is "ninety-one billion, one hundred forty-nine million, eight hundred sixty-five thousand, six hundred ninety-five".