91792780800 has 240 divisors, whose sum is σ = 346551545472. Its totient is φ = 20981145600.

The previous prime is 91792780799. The next prime is 91792780811. The reversal of 91792780800 is 808729719.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 98055 + ... + 439545.

Almost surely, 2^91792780800 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 91792780800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173275772736).

91792780800 is an abundant number, since it is smaller than the sum of its proper divisors (254758764672).

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

91792780800 is a wasteful number, since it uses less digits than its factorization.

91792780800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341529 (or 341508 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 51.

The spelling of 91792780800 in words is "ninety-one billion, seven hundred ninety-two million, seven hundred eighty thousand, eight hundred".