255567859489 has 2 divisors, whose sum is σ = 255567859490. Its totient is φ = 255567859488.

The previous prime is 255567859453. The next prime is 255567859523. The reversal of 255567859489 is 984958765552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159526750464 + 96041109025 = 399408^2 + 309905^2 .

It is a cyclic number.

It is not a de Polignac number, because 255567859489 - 2⁷ = 255567859361 is a prime.

It is a super-2 number, since 2×255567859489² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255567859409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127783929744 + 127783929745.

It is an arithmetic number, because the mean of its divisors is an integer number (127783929745).

Almost surely, 2^255567859489 is an apocalyptic number.

It is an amenable number.

255567859489 is a deficient number, since it is larger than the sum of its proper divisors (1).

255567859489 is an equidigital number, since it uses as much as digits as its factorization.

255567859489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640000, while the sum is 73.

The spelling of 255567859489 in words is "two hundred fifty-five billion, five hundred sixty-seven million, eight hundred fifty-nine thousand, four hundred eighty-nine".