91791360000 has 680 divisors, whose sum is σ = 343951275360. Its totient is φ = 24182784000.

The previous prime is 91791359987. The next prime is 91791360007. The reversal of 91791360000 is 6319719.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (91791360007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1105919959 + ... + 1105920041.

Almost surely, 2^91791360000 is an apocalyptic number.

91791360000 is a gapful number since it is divisible by the number (90) 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 91791360000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171975637680).

91791360000 is an abundant number, since it is smaller than the sum of its proper divisors (252159915360).

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

91791360000 is an frugal number, since it uses more digits than its factorization.

91791360000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

Adding to 91791360000 its reverse (6319719), we get a palindrome (91797679719).

The spelling of 91791360000 in words is "ninety-one billion, seven hundred ninety-one million, three hundred sixty thousand".