611061281 has 2 divisors, whose sum is σ = 611061282. Its totient is φ = 611061280.

The previous prime is 611061259. The next prime is 611061331. The reversal of 611061281 is 182160116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 610880656 + 180625 = 24716^2 + 425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611061281 is a prime.

It is a super-2 number, since 2×611061281² = 746791778274721922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 611061281.

It is not a weakly prime, because it can be changed into another prime (611061251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305530640 + 305530641.

It is an arithmetic number, because the mean of its divisors is an integer number (305530641).

Almost surely, 2^611061281 is an apocalyptic number.

It is an amenable number.

611061281 is a deficient number, since it is larger than the sum of its proper divisors (1).

611061281 is an equidigital number, since it uses as much as digits as its factorization.

611061281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 611061281 is about 24719.6537394843. The cubic root of 611061281 is about 848.5841624537.

The spelling of 611061281 in words is "six hundred eleven million, sixty-one thousand, two hundred eighty-one".