99916792878 has 192 divisors, whose sum is σ = 250486359552. Its totient is φ = 26426695680.

The previous prime is 99916792861. The next prime is 99916792891. The reversal of 99916792878 is 87829761999.

99916792878 is a nontrivial binomial coefficient, being equal to C(447028, 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 32855038 + ... + 32858078.

It is an arithmetic number, because the mean of its divisors is an integer number (1304616456).

Almost surely, 2^99916792878 is an apocalyptic number.

99916792878 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

99916792878 is the 447027-th triangular number and also the 223514-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99916792878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125243179776).

99916792878 is an abundant number, since it is smaller than the sum of its proper divisors (150569566674).

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

99916792878 is a wasteful number, since it uses less digits than its factorization.

99916792878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239 (or 3232 counting only the distinct ones).

The product of its digits is 246903552, while the sum is 75.

The spelling of 99916792878 in words is "ninety-nine billion, nine hundred sixteen million, seven hundred ninety-two thousand, eight hundred seventy-eight".