5239868855849 has 2 divisors, whose sum is σ = 5239868855850. Its totient is φ = 5239868855848.

The previous prime is 5239868855843. The next prime is 5239868855861. The reversal of 5239868855849 is 9485588689325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3995573225449 + 1244295630400 = 1998893^2 + 1115480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5239868855849 is a prime.

It is not a weakly prime, because it can be changed into another prime (5239868855843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2619934427924 + 2619934427925.

It is an arithmetic number, because the mean of its divisors is an integer number (2619934427925).

Almost surely, 2^{5239868855849} is an apocalyptic number.

It is an amenable number.

5239868855849 is a deficient number, since it is larger than the sum of its proper divisors (1).

5239868855849 is an equidigital number, since it uses as much as digits as its factorization.

5239868855849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5971968000, while the sum is 80.

The spelling of 5239868855849 in words is "five trillion, two hundred thirty-nine billion, eight hundred sixty-eight million, eight hundred fifty-five thousand, eight hundred forty-nine".