255507557843 has 2 divisors, whose sum is σ = 255507557844. Its totient is φ = 255507557842.

The previous prime is 255507557783. The next prime is 255507557849. The reversal of 255507557843 is 348755705552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255507557843 - 2¹² = 255507553747 is a prime.

It is a super-2 number, since 2×255507557843² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (255507557849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127753778921 + 127753778922.

It is an arithmetic number, because the mean of its divisors is an integer number (127753778922).

Almost surely, 2^255507557843 is an apocalyptic number.

255507557843 is a deficient number, since it is larger than the sum of its proper divisors (1).

255507557843 is an equidigital number, since it uses as much as digits as its factorization.

255507557843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400000, while the sum is 56.

The spelling of 255507557843 in words is "two hundred fifty-five billion, five hundred seven million, five hundred fifty-seven thousand, eight hundred forty-three".