91453683744 has 216 divisors, whose sum is σ = 284654457360. Its totient is φ = 28879224192.

The previous prime is 91453683743. The next prime is 91453683749. The reversal of 91453683744 is 44738635419.

91453683744 is a `hidden beast` number, since 91 + 453 + 68 + 3 + 7 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (216).

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 (91453683743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2790847 + ... + 2823425.

It is an arithmetic number, because the mean of its divisors is an integer number (1317844710).

Almost surely, 2^91453683744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91453683744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142327228680).

91453683744 is an abundant number, since it is smaller than the sum of its proper divisors (193200773616).

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

91453683744 is a wasteful number, since it uses less digits than its factorization.

91453683744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32642 (or 32603 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 91453683744 in words is "ninety-one billion, four hundred fifty-three million, six hundred eighty-three thousand, seven hundred forty-four".