255466216139 has 2 divisors, whose sum is σ = 255466216140. Its totient is φ = 255466216138.

The previous prime is 255466216121. The next prime is 255466216151. The reversal of 255466216139 is 931612664552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255466216139 - 2²⁰ = 255465167563 is a prime.

It is not a weakly prime, because it can be changed into another prime (255466216189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127733108069 + 127733108070.

It is an arithmetic number, because the mean of its divisors is an integer number (127733108070).

Almost surely, 2^255466216139 is an apocalyptic number.

255466216139 is a deficient number, since it is larger than the sum of its proper divisors (1).

255466216139 is an equidigital number, since it uses as much as digits as its factorization.

255466216139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 50.

The spelling of 255466216139 in words is "two hundred fifty-five billion, four hundred sixty-six million, two hundred sixteen thousand, one hundred thirty-nine".