11982497913 has 28 divisors (see below), whose sum is σ = 17974468068. Its totient is φ = 7984357920.

The previous prime is 11982497903. The next prime is 11982497959. The reversal of 11982497913 is 31979428911.

11982497913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2826304569 + 9156193344 = 53163^2 + 95688^2 .

It is not a de Polignac number, because 11982497913 - 2¹³ = 11982489721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11982497913.

It is not an unprimeable number, because it can be changed into a prime (11982497903) 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 27 ways as a sum of consecutive naturals, for example, 2590743 + ... + 2595363.

Almost surely, 2^11982497913 is an apocalyptic number.

It is an amenable number.

11982497913 is a deficient number, since it is larger than the sum of its proper divisors (5991970155).

11982497913 is an frugal number, since it uses more digits than its factorization.

11982497913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8196 (or 8181 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The spelling of 11982497913 in words is "eleven billion, nine hundred eighty-two million, four hundred ninety-seven thousand, nine hundred thirteen".