91767165091779 has 8 divisors (see below), whose sum is σ = 122357303688960. Its totient is φ = 61177568277896.

The previous prime is 91767165091747. The next prime is 91767165091781. The reversal of 91767165091779 is 97719056176719.

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

It is a cyclic number.

It is not a de Polignac number, because 91767165091779 - 2⁵ = 91767165091747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91767165091779.

It is not an unprimeable number, because it can be changed into a prime (91767165091799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135050439 + ... + 135728240.

It is an arithmetic number, because the mean of its divisors is an integer number (15294662961120).

Almost surely, 2^{91767165091779} is an apocalyptic number.

91767165091779 is a deficient number, since it is larger than the sum of its proper divisors (30590138597181).

91767165091779 is a wasteful number, since it uses less digits than its factorization.

91767165091779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270891649.

The product of its (nonzero) digits is 315059220, while the sum is 75.

The spelling of 91767165091779 in words is "ninety-one trillion, seven hundred sixty-seven billion, one hundred sixty-five million, ninety-one thousand, seven hundred seventy-nine".