99439535250 has 256 divisors, whose sum is σ = 316688486400. Its totient is φ = 22837464000.

The previous prime is 99439535213. The next prime is 99439535263. The reversal of 99439535250 is 5253593499.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1375507 + ... + 1445993.

It is an arithmetic number, because the mean of its divisors is an integer number (1237064400).

Almost surely, 2^99439535250 is an apocalyptic number.

99439535250 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 99439535250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158344243200).

99439535250 is an abundant number, since it is smaller than the sum of its proper divisors (217248951150).

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

99439535250 is a wasteful number, since it uses less digits than its factorization.

99439535250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70543 (or 70527 counting only the distinct ones).

The product of its (nonzero) digits is 6561000, while the sum is 54.

The spelling of 99439535250 in words is "ninety-nine billion, four hundred thirty-nine million, five hundred thirty-five thousand, two hundred fifty".