11944931945 has 32 divisors (see below), whose sum is σ = 15219515520. Its totient is φ = 8984263680.

The previous prime is 11944931917. The next prime is 11944931981. The reversal of 11944931945 is 54913944911.

It is not a de Polignac number, because 11944931945 - 2¹⁸ = 11944669801 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 11944931893 and 11944931902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2160785 + ... + 2166305.

It is an arithmetic number, because the mean of its divisors is an integer number (475609860).

Almost surely, 2^11944931945 is an apocalyptic number.

It is an amenable number.

11944931945 is a deficient number, since it is larger than the sum of its proper divisors (3274583575).

11944931945 is a wasteful number, since it uses less digits than its factorization.

11944931945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945.

The product of its digits is 699840, while the sum is 50.

The spelling of 11944931945 in words is "eleven billion, nine hundred forty-four million, nine hundred thirty-one thousand, nine hundred forty-five".