11943849599 has 4 divisors (see below), whose sum is σ = 13029654120. Its totient is φ = 10858045080.

The previous prime is 11943849587. The next prime is 11943849629. The reversal of 11943849599 is 99594834911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11943849599 - 2¹⁶ = 11943784063 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 (11943849529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542902244 + ... + 542902265.

It is an arithmetic number, because the mean of its divisors is an integer number (3257413530).

Almost surely, 2^11943849599 is an apocalyptic number.

11943849599 is a deficient number, since it is larger than the sum of its proper divisors (1085804521).

11943849599 is a wasteful number, since it uses less digits than its factorization.

11943849599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085804520.

The product of its digits is 12597120, while the sum is 62.

The spelling of 11943849599 in words is "eleven billion, nine hundred forty-three million, eight hundred forty-nine thousand, five hundred ninety-nine".