99399252720 has 80 divisors (see below), whose sum is σ = 321534991872. Its totient is φ = 25354010880.

The previous prime is 99399252713. The next prime is 99399252721. The reversal of 99399252720 is 2725299399.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×99399252720² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99399252721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8998036 + ... + 9009075.

Almost surely, 2^99399252720 is an apocalyptic number.

It is an amenable number.

99399252720 is an abundant number, since it is smaller than the sum of its proper divisors (222135739152).

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

99399252720 is a wasteful number, since it uses less digits than its factorization.

99399252720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18007150 (or 18007144 counting only the distinct ones).

The product of its (nonzero) digits is 5511240, while the sum is 57.

The spelling of 99399252720 in words is "ninety-nine billion, three hundred ninety-nine million, two hundred fifty-two thousand, seven hundred twenty".