612346643309 has 2 divisors, whose sum is σ = 612346643310. Its totient is φ = 612346643308.

The previous prime is 612346643203. The next prime is 612346643333. The reversal of 612346643309 is 903346643216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586955176900 + 25391466409 = 766130^2 + 159347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612346643309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612346640309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306173321654 + 306173321655.

It is an arithmetic number, because the mean of its divisors is an integer number (306173321655).

Almost surely, 2^612346643309 is an apocalyptic number.

It is an amenable number.

612346643309 is a deficient number, since it is larger than the sum of its proper divisors (1).

612346643309 is an equidigital number, since it uses as much as digits as its factorization.

612346643309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 47.

The spelling of 612346643309 in words is "six hundred twelve billion, three hundred forty-six million, six hundred forty-three thousand, three hundred nine".