99684691200 has 540 divisors, whose sum is σ = 380530727808. Its totient is φ = 25720934400.

The previous prime is 99684691199. The next prime is 99684691277. The reversal of 99684691200 is 219648699.

It is a tau number, because it is divible by the number of its divisors (540).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 16067299 + ... + 16073501.

Almost surely, 2^99684691200 is an apocalyptic number.

99684691200 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99684691200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190265363904).

99684691200 is an abundant number, since it is smaller than the sum of its proper divisors (280846036608).

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

99684691200 is a wasteful number, since it uses less digits than its factorization.

99684691200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6272 (or 6244 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 99684691200 in words is "ninety-nine billion, six hundred eighty-four million, six hundred ninety-one thousand, two hundred".