91616940800 has 324 divisors, whose sum is σ = 284880235248. Its totient is φ = 28554240000.

The previous prime is 91616940791. The next prime is 91616940823. The reversal of 91616940800 is 804961619.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5412350 + ... + 5429250.

Almost surely, 2^91616940800 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 91616940800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142440117624).

91616940800 is an abundant number, since it is smaller than the sum of its proper divisors (193263294448).

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

91616940800 is a wasteful number, since it uses less digits than its factorization.

91616940800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16956 (or 16926 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 91616940800 in words is "ninety-one billion, six hundred sixteen million, nine hundred forty thousand, eight hundred".