99891223600 has 180 divisors, whose sum is σ = 286717717344. Its totient is φ = 33322544640.

The previous prime is 99891223583. The next prime is 99891223609. The reversal of 99891223600 is 632219899.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (99891223609) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 656329 + ... + 794071.

Almost surely, 2^99891223600 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 99891223600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143358858672).

99891223600 is an abundant number, since it is smaller than the sum of its proper divisors (186826493744).

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

99891223600 is a wasteful number, since it uses less digits than its factorization.

99891223600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137812 (or 137794 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 49.

The spelling of 99891223600 in words is "ninety-nine billion, eight hundred ninety-one million, two hundred twenty-three thousand, six hundred".