5255871079681 has 2 divisors, whose sum is σ = 5255871079682. Its totient is φ = 5255871079680.

The previous prime is 5255871079639. The next prime is 5255871079691. The reversal of 5255871079681 is 1869701785525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4844220519681 + 411650560000 = 2200959^2 + 641600^2 .

It is a cyclic number.

It is not a de Polignac number, because 5255871079681 - 2¹⁹ = 5255870555393 is a prime.

It is a super-2 number, since 2×5255871079681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5255871079691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2627935539840 + 2627935539841.

It is an arithmetic number, because the mean of its divisors is an integer number (2627935539841).

Almost surely, 2^{5255871079681} is an apocalyptic number.

It is an amenable number.

5255871079681 is a deficient number, since it is larger than the sum of its proper divisors (1).

5255871079681 is an equidigital number, since it uses as much as digits as its factorization.

5255871079681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336000, while the sum is 64.

The spelling of 5255871079681 in words is "five trillion, two hundred fifty-five billion, eight hundred seventy-one million, seventy-nine thousand, six hundred eighty-one".