99978045030 has 96 divisors (see below), whose sum is σ = 274149757440. Its totient is φ = 25209092160.

The previous prime is 99978045019. The next prime is 99978045047. The reversal of 99978045030 is 3054087999.

99978045030 is a `hidden beast` number, since 9 + 99 + 78 + 0 + 450 + 30 = 666.

99978045030 is a nontrivial binomial coefficient, being equal to C(447165, 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 838435 + ... + 950225.

It is an arithmetic number, because the mean of its divisors is an integer number (2855726640).

Almost surely, 2^99978045030 is an apocalyptic number.

99978045030 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99978045030 is the 447164-th triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99978045030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137074878720).

99978045030 is an abundant number, since it is smaller than the sum of its proper divisors (174171712410).

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

99978045030 is a wasteful number, since it uses less digits than its factorization.

99978045030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112346 (or 112343 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 99978045030 in words is "ninety-nine billion, nine hundred seventy-eight million, forty-five thousand, thirty".