91707809472 has 224 divisors, whose sum is σ = 283556659200. Its totient is φ = 29008336896.

The previous prime is 91707809437. The next prime is 91707809477. The reversal of 91707809472 is 27490870719.

91707809472 is a `hidden beast` number, since 91 + 7 + 0 + 7 + 80 + 9 + 472 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (91707809477) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5038404 + ... + 5056572.

Almost surely, 2^91707809472 is an apocalyptic number.

91707809472 is a gapful number since it is divisible by the number (92) 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 91707809472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141778329600).

91707809472 is an abundant number, since it is smaller than the sum of its proper divisors (191848849728).

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

91707809472 is a wasteful number, since it uses less digits than its factorization.

91707809472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18340 (or 18324 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The spelling of 91707809472 in words is "ninety-one billion, seven hundred seven million, eight hundred nine thousand, four hundred seventy-two".