13857143729 has 12 divisors (see below), whose sum is σ = 16403054388. Its totient is φ = 11628371040.

The previous prime is 13857143701. The next prime is 13857143749. The reversal of 13857143729 is 92734175831.

It can be written as a sum of positive squares in 2 ways, for example, as 3821712400 + 10035431329 = 61820^2 + 100177^2 .

It is not a de Polignac number, because 13857143729 - 2⁸ = 13857143473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13857143749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4403114 + ... + 4406259.

It is an arithmetic number, because the mean of its divisors is an integer number (1366921199).

Almost surely, 2^13857143729 is an apocalyptic number.

It is an amenable number.

13857143729 is a deficient number, since it is larger than the sum of its proper divisors (2545910659).

13857143729 is a wasteful number, since it uses less digits than its factorization.

13857143729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8809408 (or 8809397 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 50.

The spelling of 13857143729 in words is "thirteen billion, eight hundred fifty-seven million, one hundred forty-three thousand, seven hundred twenty-nine".