9940945599 has 24 divisors (see below), whose sum is σ = 15468131952. Its totient is φ = 6115749120.

The previous prime is 9940945591. The next prime is 9940945633. The reversal of 9940945599 is 9955490499.

It is a happy number.

9940945599 is a `hidden beast` number, since 9 + 94 + 0 + 9 + 455 + 99 = 666.

9940945599 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9940945599 - 2³ = 9940945591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940945591) 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 23 ways as a sum of consecutive naturals, for example, 482599 + ... + 502775.

It is an arithmetic number, because the mean of its divisors is an integer number (644505498).

Almost surely, 2^9940945599 is an apocalyptic number.

9940945599 is a deficient number, since it is larger than the sum of its proper divisors (5527186353).

9940945599 is a wasteful number, since it uses less digits than its factorization.

9940945599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24407 (or 24404 counting only the distinct ones).

The product of its (nonzero) digits is 23619600, while the sum is 63.

The square root of 9940945599 is about 99704.2907752721. The cubic root of 9940945599 is about 2150.1853526158.

The spelling of 9940945599 in words is "nine billion, nine hundred forty million, nine hundred forty-five thousand, five hundred ninety-nine".