9945478745499 has 24 divisors (see below), whose sum is σ = 14598064501776. Its totient is φ = 6018332161600.

The previous prime is 9945478745491. The next prime is 9945478745513.

9945478745499 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9945478745499 - 2³ = 9945478745491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9945478745491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20741532 + ... + 21215609.

It is an arithmetic number, because the mean of its divisors is an integer number (608252687574).

Almost surely, 2^{9945478745499} is an apocalyptic number.

9945478745499 is a deficient number, since it is larger than the sum of its proper divisors (4652585756277).

9945478745499 is a wasteful number, since it uses less digits than its factorization.

9945478745499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41957819 (or 41957808 counting only the distinct ones).

The product of its digits is 16460236800, while the sum is 84.

The spelling of 9945478745499 in words is "nine trillion, nine hundred forty-five billion, four hundred seventy-eight million, seven hundred forty-five thousand, four hundred ninety-nine".