91603995600 has 240 divisors, whose sum is σ = 326205899264. Its totient is φ = 21821184000.

The previous prime is 91603995599. The next prime is 91603995611. The reversal of 91603995600 is 659930619.

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

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 91603995600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 388890 + ... + 578310.

Almost surely, 2^91603995600 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 91603995600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163102949632).

91603995600 is an abundant number, since it is smaller than the sum of its proper divisors (234601903664).

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

91603995600 is a wasteful number, since it uses less digits than its factorization.

91603995600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189486 (or 189475 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 48.

The spelling of 91603995600 in words is "ninety-one billion, six hundred three million, nine hundred ninety-five thousand, six hundred".