9990120552 has 16 divisors (see below), whose sum is σ = 24975301440. Its totient is φ = 3330040176.

The previous prime is 9990120551. The next prime is 9990120563. The reversal of 9990120552 is 2550210999.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9990120551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208127488 + ... + 208127535.

It is an arithmetic number, because the mean of its divisors is an integer number (1560956340).

Almost surely, 2^9990120552 is an apocalyptic number.

It is an amenable number.

9990120552 is an abundant number, since it is smaller than the sum of its proper divisors (14985180888).

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

9990120552 is a wasteful number, since it uses less digits than its factorization.

9990120552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416255032 (or 416255028 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 9990120552 is about 99950.5905535330. The cubic root of 9990120552 is about 2153.7249687424.

The spelling of 9990120552 in words is "nine billion, nine hundred ninety million, one hundred twenty thousand, five hundred fifty-two".