13728464857 has 2 divisors, whose sum is σ = 13728464858. Its totient is φ = 13728464856.

The previous prime is 13728464843. The next prime is 13728464863. The reversal of 13728464857 is 75846482731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8059730176 + 5668734681 = 89776^2 + 75291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13728464857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13728464798 and 13728464807.

It is not a weakly prime, because it can be changed into another prime (13728464837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6864232428 + 6864232429.

It is an arithmetic number, because the mean of its divisors is an integer number (6864232429).

Almost surely, 2^13728464857 is an apocalyptic number.

It is an amenable number.

13728464857 is a deficient number, since it is larger than the sum of its proper divisors (1).

13728464857 is an equidigital number, since it uses as much as digits as its factorization.

13728464857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9031680, while the sum is 55.

The spelling of 13728464857 in words is "thirteen billion, seven hundred twenty-eight million, four hundred sixty-four thousand, eight hundred fifty-seven".