14991543973 has 12 divisors (see below), whose sum is σ = 17462223372. Its totient is φ = 12832888320.

The previous prime is 14991543967. The next prime is 14991543991. The reversal of 14991543973 is 37934519941.

It can be written as a sum of positive squares in 2 ways, for example, as 3007206244 + 11984337729 = 54838^2 + 109473^2 .

It is not a de Polignac number, because 14991543973 - 2⁹ = 14991543461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14991543943) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 164988 + ... + 239173.

It is an arithmetic number, because the mean of its divisors is an integer number (1455185281).

Almost surely, 2^14991543973 is an apocalyptic number.

It is an amenable number.

14991543973 is a deficient number, since it is larger than the sum of its proper divisors (2470679399).

14991543973 is an equidigital number, since it uses as much as digits as its factorization.

14991543973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404932 (or 404925 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 55.

The spelling of 14991543973 in words is "fourteen billion, nine hundred ninety-one million, five hundred forty-three thousand, nine hundred seventy-three".