99868593440 has 384 divisors, whose sum is σ = 315995904000. Its totient is φ = 29486177280.

The previous prime is 99868593413. The next prime is 99868593463. The reversal of 99868593440 is 4439586899.

It is a super-2 number, since 2×99868593440² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11465567 + ... + 11474273.

It is an arithmetic number, because the mean of its divisors is an integer number (822906000).

Almost surely, 2^99868593440 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 99868593440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157997952000).

99868593440 is an abundant number, since it is smaller than the sum of its proper divisors (216127310560).

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

99868593440 is a wasteful number, since it uses less digits than its factorization.

99868593440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8773 (or 8751 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 65.

The spelling of 99868593440 in words is "ninety-nine billion, eight hundred sixty-eight million, five hundred ninety-three thousand, four hundred forty".