9990388516 has 6 divisors (see below), whose sum is σ = 17483179910. Its totient is φ = 4995194256.

The previous prime is 9990388483. The next prime is 9990388517. The reversal of 9990388516 is 6158830999.

9990388516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5535360000 + 4455028516 = 74400^2 + 66746^2 .

It is not an unprimeable number, because it can be changed into a prime (9990388517) 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 as a sum of consecutive naturals, namely, 1248798561 + ... + 1248798568.

Almost surely, 2^9990388516 is an apocalyptic number.

It is an amenable number.

9990388516 is a deficient number, since it is larger than the sum of its proper divisors (7492791394).

9990388516 is a wasteful number, since it uses less digits than its factorization.

9990388516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497597133 (or 2497597131 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 58.

The square root of 9990388516 is about 99951.9310268691. The cubic root of 9990388516 is about 2153.7442249531.

The spelling of 9990388516 in words is "nine billion, nine hundred ninety million, three hundred eighty-eight thousand, five hundred sixteen".