91936473820 has 96 divisors (see below), whose sum is σ = 209568844800. Its totient is φ = 33763392000.

The previous prime is 91936473787. The next prime is 91936473829. The reversal of 91936473820 is 2837463919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91936473829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2333041 + ... + 2372119.

It is an arithmetic number, because the mean of its divisors is an integer number (2183008800).

Almost surely, 2^91936473820 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 91936473820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104784422400).

91936473820 is an abundant number, since it is smaller than the sum of its proper divisors (117632370980).

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

91936473820 is a wasteful number, since it uses less digits than its factorization.

91936473820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39299 (or 39297 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 91936473820 in words is "ninety-one billion, nine hundred thirty-six million, four hundred seventy-three thousand, eight hundred twenty".