91380447600 has 240 divisors, whose sum is σ = 315993775104. Its totient is φ = 22439808000.

The previous prime is 91380447581. The next prime is 91380447623. The reversal of 91380447600 is 674408319.

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 (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6716805 + ... + 6730395.

Almost surely, 2^91380447600 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 91380447600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157996887552).

91380447600 is an abundant number, since it is smaller than the sum of its proper divisors (224613327504).

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

91380447600 is a wasteful number, since it uses less digits than its factorization.

91380447600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14056 (or 14045 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 91380447600 in words is "ninety-one billion, three hundred eighty million, four hundred forty-seven thousand, six hundred".