612709360561 has 2 divisors, whose sum is σ = 612709360562. Its totient is φ = 612709360560.

The previous prime is 612709360559. The next prime is 612709360579. The reversal of 612709360561 is 165063907216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 490918830336 + 121790530225 = 700656^2 + 348985^2 .

It is a cyclic number.

It is not a de Polignac number, because 612709360561 - 2¹ = 612709360559 is a prime.

Together with 612709360559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (612709360261) 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, 306354680280 + 306354680281.

It is an arithmetic number, because the mean of its divisors is an integer number (306354680281).

Almost surely, 2^612709360561 is an apocalyptic number.

It is an amenable number.

612709360561 is a deficient number, since it is larger than the sum of its proper divisors (1).

612709360561 is an equidigital number, since it uses as much as digits as its factorization.

612709360561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 612709360561 in words is "six hundred twelve billion, seven hundred nine million, three hundred sixty thousand, five hundred sixty-one".