13857647243 has 16 divisors (see below), whose sum is σ = 15381273600. Its totient is φ = 12378206880.

The previous prime is 13857647203. The next prime is 13857647261. The reversal of 13857647243 is 34274675831.

It is a cyclic number.

It is not a de Polignac number, because 13857647243 - 2¹² = 13857643147 is a prime.

It is a super-2 number, since 2×13857647243² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13857647191 and 13857647200.

It is not an unprimeable number, because it can be changed into a prime (13857647203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1760705 + ... + 1768557.

It is an arithmetic number, because the mean of its divisors is an integer number (961329600).

Almost surely, 2^13857647243 is an apocalyptic number.

13857647243 is a deficient number, since it is larger than the sum of its proper divisors (1523626357).

13857647243 is a wasteful number, since it uses less digits than its factorization.

13857647243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10642.

The product of its digits is 3386880, while the sum is 50.

The spelling of 13857647243 in words is "thirteen billion, eight hundred fifty-seven million, six hundred forty-seven thousand, two hundred forty-three".