2557565865853 has 2 divisors, whose sum is σ = 2557565865854. Its totient is φ = 2557565865852.

The previous prime is 2557565865847. The next prime is 2557565865857. The reversal of 2557565865853 is 3585685657552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2425613123844 + 131952742009 = 1557438^2 + 363253^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557565865853 - 2⁴¹ = 358542610301 is a prime.

It is a super-2 number, since 2×2557565865853² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557565865857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278782932926 + 1278782932927.

It is an arithmetic number, because the mean of its divisors is an integer number (1278782932927).

Almost surely, 2^{2557565865853} is an apocalyptic number.

It is an amenable number.

2557565865853 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557565865853 is an equidigital number, since it uses as much as digits as its factorization.

2557565865853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512000000, while the sum is 70.

The spelling of 2557565865853 in words is "two trillion, five hundred fifty-seven billion, five hundred sixty-five million, eight hundred sixty-five thousand, eight hundred fifty-three".