91077316691 has 8 divisors (see below), whose sum is σ = 91895612400. Its totient is φ = 90261781792.

The previous prime is 91077316669. The next prime is 91077316697. The reversal of 91077316691 is 19661377019.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91077316691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91077316697) 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, 623900 + ... + 755913.

It is an arithmetic number, because the mean of its divisors is an integer number (11486951550).

Almost surely, 2^91077316691 is an apocalyptic number.

91077316691 is a deficient number, since it is larger than the sum of its proper divisors (818295709).

91077316691 is a wasteful number, since it uses less digits than its factorization.

91077316691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380405.

The product of its (nonzero) digits is 428652, while the sum is 50.

The spelling of 91077316691 in words is "ninety-one billion, seventy-seven million, three hundred sixteen thousand, six hundred ninety-one".