126567375254209 has 2 divisors, whose sum is σ = 126567375254210. Its totient is φ = 126567375254208.

The previous prime is 126567375254191. The next prime is 126567375254233. The reversal of 126567375254209 is 902452573765621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119203750294209 + 7363624960000 = 10918047^2 + 2713600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126567375254209 is a prime.

It is not a weakly prime, because it can be changed into another prime (126567375254009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63283687627104 + 63283687627105.

It is an arithmetic number, because the mean of its divisors is an integer number (63283687627105).

Almost surely, 2^{126567375254209} is an apocalyptic number.

It is an amenable number.

126567375254209 is a deficient number, since it is larger than the sum of its proper divisors (1).

126567375254209 is an equidigital number, since it uses as much as digits as its factorization.

126567375254209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512000, while the sum is 64.

The spelling of 126567375254209 in words is "one hundred twenty-six trillion, five hundred sixty-seven billion, three hundred seventy-five million, two hundred fifty-four thousand, two hundred nine".