91000000000985 has 8 divisors (see below), whose sum is σ = 109869938652480. Its totient is φ = 72353374233264.

The previous prime is 91000000000961. The next prime is 91000000000991. The reversal of 91000000000985 is 58900000000019.

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 91000000000985 - 2⁸ = 91000000000729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55828220045 + ... + 55828221674.

It is an arithmetic number, because the mean of its divisors is an integer number (13733742331560).

Almost surely, 2^{91000000000985} is an apocalyptic number.

It is an amenable number.

91000000000985 is a deficient number, since it is larger than the sum of its proper divisors (18869938651495).

91000000000985 is a wasteful number, since it uses less digits than its factorization.

91000000000985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111656441887.

The product of its (nonzero) digits is 3240, while the sum is 32.

The spelling of 91000000000985 in words is "ninety-one trillion, nine hundred eighty-five", and thus it is an aban number.