99870357504 has 192 divisors, whose sum is σ = 287253177120. Its totient is φ = 30739005440.

The previous prime is 99870357491. The next prime is 99870357553. The reversal of 99870357504 is 40575307899.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×99870357504² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5526724 + ... + 5544764.

Almost surely, 2^99870357504 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 99870357504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143626588560).

99870357504 is an abundant number, since it is smaller than the sum of its proper divisors (187382819616).

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

99870357504 is a wasteful number, since it uses less digits than its factorization.

99870357504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18136 (or 18116 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 57.

The spelling of 99870357504 in words is "ninety-nine billion, eight hundred seventy million, three hundred fifty-seven thousand, five hundred four".