1255319144069 has 2 divisors, whose sum is σ = 1255319144070. Its totient is φ = 1255319144068.

The previous prime is 1255319144039. The next prime is 1255319144161. The reversal of 1255319144069 is 9604419135521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1226250599044 + 29068545025 = 1107362^2 + 170495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255319144069 is a prime.

It is a super-2 number, since 2×1255319144069² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255319144039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627659572034 + 627659572035.

It is an arithmetic number, because the mean of its divisors is an integer number (627659572035).

Almost surely, 2^{1255319144069} is an apocalyptic number.

It is an amenable number.

1255319144069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255319144069 is an equidigital number, since it uses as much as digits as its factorization.

1255319144069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 1255319144069 in words is "one trillion, two hundred fifty-five billion, three hundred nineteen million, one hundred forty-four thousand, sixty-nine".