91796190816 has 192 divisors, whose sum is σ = 280607846400. Its totient is φ = 25981401600.

The previous prime is 91796190799. The next prime is 91796190869. The reversal of 91796190816 is 61809169719.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1392325 + ... + 1456763.

It is an arithmetic number, because the mean of its divisors is an integer number (1461499200).

Almost surely, 2^91796190816 is an apocalyptic number.

91796190816 is a gapful number since it is divisible by the number (96) 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 91796190816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140303923200).

91796190816 is an abundant number, since it is smaller than the sum of its proper divisors (188811655584).

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

91796190816 is a wasteful number, since it uses less digits than its factorization.

91796190816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64553 (or 64545 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 57.

The spelling of 91796190816 in words is "ninety-one billion, seven hundred ninety-six million, one hundred ninety thousand, eight hundred sixteen".