611565326213 has 2 divisors, whose sum is σ = 611565326214. Its totient is φ = 611565326212.

The previous prime is 611565326179. The next prime is 611565326227. The reversal of 611565326213 is 312623565116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 548261759809 + 63303566404 = 740447^2 + 251602^2 .

It is a cyclic number.

It is not a de Polignac number, because 611565326213 - 2¹² = 611565322117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611565326233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305782663106 + 305782663107.

It is an arithmetic number, because the mean of its divisors is an integer number (305782663107).

Almost surely, 2^611565326213 is an apocalyptic number.

It is an amenable number.

611565326213 is a deficient number, since it is larger than the sum of its proper divisors (1).

611565326213 is an equidigital number, since it uses as much as digits as its factorization.

611565326213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 41.

The spelling of 611565326213 in words is "six hundred eleven billion, five hundred sixty-five million, three hundred twenty-six thousand, two hundred thirteen".