99968778900 has 216 divisors, whose sum is σ = 321706117824. Its totient is φ = 25950067200.

The previous prime is 99968778887. The next prime is 99968778911. The reversal of 99968778900 is 987786999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17967519 + ... + 17973081.

Almost surely, 2^99968778900 is an apocalyptic number.

99968778900 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 99968778900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160853058912).

99968778900 is an abundant number, since it is smaller than the sum of its proper divisors (221737338924).

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

99968778900 is a wasteful number, since it uses less digits than its factorization.

99968778900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6111 (or 6101 counting only the distinct ones).

The product of its (nonzero) digits is 123451776, while the sum is 72.

The spelling of 99968778900 in words is "ninety-nine billion, nine hundred sixty-eight million, seven hundred seventy-eight thousand, nine hundred".