91683517680 has 100 divisors (see below), whose sum is σ = 318430462152. Its totient is φ = 24448936320.

The previous prime is 91683517663. The next prime is 91683517691. The reversal of 91683517680 is 8671538619.

91683517680 is a `hidden beast` number, since 9 + 1 + 68 + 3 + 517 + 68 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7067866 + ... + 7080825.

Almost surely, 2^91683517680 is an apocalyptic number.

91683517680 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

91683517680 is an abundant number, since it is smaller than the sum of its proper divisors (226746944472).

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

91683517680 is a wasteful number, since it uses less digits than its factorization.

91683517680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14148716 (or 14148701 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 91683517680 in words is "ninety-one billion, six hundred eighty-three million, five hundred seventeen thousand, six hundred eighty".