13856199849 has 32 divisors (see below), whose sum is σ = 21065788800. Its totient is φ = 8997842880.

The previous prime is 13856199829. The next prime is 13856199853. The reversal of 13856199849 is 94899165831.

13856199849 is a `hidden beast` number, since 1 + 3 + 8 + 5 + 619 + 9 + 8 + 4 + 9 = 666.

It is not a de Polignac number, because 13856199849 - 2¹² = 13856195753 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13856199829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164079 + ... + 233739.

It is an arithmetic number, because the mean of its divisors is an integer number (658305900).

Almost surely, 2^13856199849 is an apocalyptic number.

It is an amenable number.

13856199849 is a deficient number, since it is larger than the sum of its proper divisors (7209588951).

13856199849 is a wasteful number, since it uses less digits than its factorization.

13856199849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69862 (or 69856 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The spelling of 13856199849 in words is "thirteen billion, eight hundred fifty-six million, one hundred ninety-nine thousand, eight hundred forty-nine".