611564656279 has 2 divisors, whose sum is σ = 611564656280. Its totient is φ = 611564656278.

The previous prime is 611564656259. The next prime is 611564656319. The reversal of 611564656279 is 972656465116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611564656279 - 2¹⁹ = 611564131991 is a prime.

It is a super-2 number, since 2×611564656279² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611564656259) 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, 305782328139 + 305782328140.

It is an arithmetic number, because the mean of its divisors is an integer number (305782328140).

Almost surely, 2^611564656279 is an apocalyptic number.

611564656279 is a deficient number, since it is larger than the sum of its proper divisors (1).

611564656279 is an equidigital number, since it uses as much as digits as its factorization.

611564656279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 58.

The spelling of 611564656279 in words is "six hundred eleven billion, five hundred sixty-four million, six hundred fifty-six thousand, two hundred seventy-nine".