9899630824 has 8 divisors (see below), whose sum is σ = 18561807810. Its totient is φ = 4949815408.

The previous prime is 9899630789. The next prime is 9899630837. The reversal of 9899630824 is 4280369989.

It can be written as a sum of positive squares in only one way, i.e., 8479094724 + 1420536100 = 92082^2 + 37690^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618726919 + ... + 618726934.

Almost surely, 2^9899630824 is an apocalyptic number.

It is an amenable number.

9899630824 is a deficient number, since it is larger than the sum of its proper divisors (8662176986).

9899630824 is a wasteful number, since it uses less digits than its factorization.

9899630824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237453859 (or 1237453855 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 58.

The square root of 9899630824 is about 99496.8885141641. Note that the first 3 decimals coincide. The cubic root of 9899630824 is about 2147.2024782671.

The spelling of 9899630824 in words is "nine billion, eight hundred ninety-nine million, six hundred thirty thousand, eight hundred twenty-four".