91163816994 has 8 divisors (see below), whose sum is σ = 182327634000. Its totient is φ = 30387938996.

The previous prime is 91163816987. The next prime is 91163817001. The reversal of 91163816994 is 49961836119.

It is an interprime number because it is at equal distance from previous prime (91163816987) and next prime (91163817001).

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

91163816994 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7596984744 + ... + 7596984755.

It is an arithmetic number, because the mean of its divisors is an integer number (22790954250).

Almost surely, 2^91163816994 is an apocalyptic number.

91163816994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91163816994 is a wasteful number, since it uses less digits than its factorization.

91163816994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15193969504.

The product of its digits is 2519424, while the sum is 57.

The spelling of 91163816994 in words is "ninety-one billion, one hundred sixty-three million, eight hundred sixteen thousand, nine hundred ninety-four".