612378282809 has 2 divisors, whose sum is σ = 612378282810. Its totient is φ = 612378282808.

The previous prime is 612378282787. The next prime is 612378282853. The reversal of 612378282809 is 908282873216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543127728784 + 69250554025 = 736972^2 + 263155^2 .

It is a cyclic number.

It is not a de Polignac number, because 612378282809 - 2²⁴ = 612361505593 is a prime.

It is a super-2 number, since 2×612378282809² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (612378282409) 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, 306189141404 + 306189141405.

It is an arithmetic number, because the mean of its divisors is an integer number (306189141405).

Almost surely, 2^612378282809 is an apocalyptic number.

It is an amenable number.

612378282809 is a deficient number, since it is larger than the sum of its proper divisors (1).

612378282809 is an equidigital number, since it uses as much as digits as its factorization.

612378282809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 612378282809 in words is "six hundred twelve billion, three hundred seventy-eight million, two hundred eighty-two thousand, eight hundred nine".