91693510085 has 8 divisors (see below), whose sum is σ = 115823381280. Its totient is φ = 69494028624.

The previous prime is 91693510061. The next prime is 91693510087. The reversal of 91693510085 is 58001539619.

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-91693510085 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91693510087) 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, 482597327 + ... + 482597516.

It is an arithmetic number, because the mean of its divisors is an integer number (14477922660).

Almost surely, 2^91693510085 is an apocalyptic number.

91693510085 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

91693510085 is a deficient number, since it is larger than the sum of its proper divisors (24129871195).

91693510085 is a wasteful number, since it uses less digits than its factorization.

91693510085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965194867.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 91693510085 in words is "ninety-one billion, six hundred ninety-three million, five hundred ten thousand, eighty-five".