99549774720 has 768 divisors, whose sum is σ = 390671424000. Its totient is φ = 23146905600.

The previous prime is 99549774707. The next prime is 99549774743. The reversal of 99549774720 is 2747794599.

99549774720 is a `hidden beast` number, since 9 + 9 + 5 + 497 + 74 + 72 + 0 = 666.

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, 166192981 + ... + 166193579.

It is an arithmetic number, because the mean of its divisors is an integer number (508686750).

Almost surely, 2^99549774720 is an apocalyptic number.

99549774720 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 99549774720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195335712000).

99549774720 is an abundant number, since it is smaller than the sum of its proper divisors (291121649280).

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

99549774720 is a wasteful number, since it uses less digits than its factorization.

99549774720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 40007520, while the sum is 63.

The spelling of 99549774720 in words is "ninety-nine billion, five hundred forty-nine million, seven hundred seventy-four thousand, seven hundred twenty".