9999900045 has 24 divisors (see below), whose sum is σ = 17736260256. Its totient is φ = 5209249248.

The previous prime is 9999900017. The next prime is 9999900059. The reversal of 9999900045 is 5400099999.

It is a happy number.

It is not a de Polignac number, because 9999900045 - 2²⁴ = 9983122829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9999899964 and 9999900000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2582019 + ... + 2585888.

It is an arithmetic number, because the mean of its divisors is an integer number (739010844).

Almost surely, 2^9999900045 is an apocalyptic number.

It is an amenable number.

9999900045 is a deficient number, since it is larger than the sum of its proper divisors (7736360211).

9999900045 is a wasteful number, since it uses less digits than its factorization.

9999900045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167961 (or 5167958 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The square root of 9999900045 is about 99999.5002237511. The cubic root of 9999900045 is about 2154.4275117907.

The spelling of 9999900045 in words is "nine billion, nine hundred ninety-nine million, nine hundred thousand, forty-five".