91598998400 has 768 divisors, whose sum is σ = 293514547200. Its totient is φ = 27471052800.

The previous prime is 91598998397. The next prime is 91598998441. The reversal of 91598998400 is 489989519.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 658985531 + ... + 658985669.

It is an arithmetic number, because the mean of its divisors is an integer number (382180400).

Almost surely, 2^91598998400 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 91598998400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146757273600).

91598998400 is an abundant number, since it is smaller than the sum of its proper divisors (201915548800).

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

91598998400 is a wasteful number, since it uses less digits than its factorization.

91598998400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 62.

The spelling of 91598998400 in words is "ninety-one billion, five hundred ninety-eight million, nine hundred ninety-eight thousand, four hundred".