91459399680 has 624 divisors, whose sum is σ = 350831669760. Its totient is φ = 21852979200.

The previous prime is 91459399667. The next prime is 91459399709. The reversal of 91459399680 is 8699395419.

91459399680 is a `hidden beast` number, since 91 + 459 + 3 + 9 + 96 + 8 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 160173795 + ... + 160174365.

It is an arithmetic number, because the mean of its divisors is an integer number (562230240).

Almost surely, 2^91459399680 is an apocalyptic number.

91459399680 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91459399680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175415834880).

91459399680 is an abundant number, since it is smaller than the sum of its proper divisors (259372270080).

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

91459399680 is a wasteful number, since it uses less digits than its factorization.

91459399680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 63.

The spelling of 91459399680 in words is "ninety-one billion, four hundred fifty-nine million, three hundred ninety-nine thousand, six hundred eighty".