91304491784 has 64 divisors (see below), whose sum is σ = 192043716480. Its totient is φ = 40335424000.

The previous prime is 91304491771. The next prime is 91304491787. The reversal of 91304491784 is 48719440319.

It is not an unprimeable number, because it can be changed into a prime (91304491787) 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 15 ways as a sum of consecutive naturals, for example, 900794 + ... + 997014.

It is an arithmetic number, because the mean of its divisors is an integer number (3000683070).

Almost surely, 2^91304491784 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 91304491784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96021858240).

91304491784 is an abundant number, since it is smaller than the sum of its proper divisors (100739224696).

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

91304491784 is a wasteful number, since it uses less digits than its factorization.

91304491784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96542 (or 96538 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 91304491784 in words is "ninety-one billion, three hundred four million, four hundred ninety-one thousand, seven hundred eighty-four".