2606281861 has 2 divisors, whose sum is σ = 2606281862. Its totient is φ = 2606281860.

The previous prime is 2606281801. The next prime is 2606281877. The reversal of 2606281861 is 1681826062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2591420836 + 14861025 = 50906^2 + 3855^2 .

It is a cyclic number.

It is not a de Polignac number, because 2606281861 - 2¹¹ = 2606279813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2606281801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1303140930 + 1303140931.

It is an arithmetic number, because the mean of its divisors is an integer number (1303140931).

Almost surely, 2^2606281861 is an apocalyptic number.

It is an amenable number.

2606281861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2606281861 is an equidigital number, since it uses as much as digits as its factorization.

2606281861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 2606281861 is about 51051.7566886782. The cubic root of 2606281861 is about 1376.1754111844.

The spelling of 2606281861 in words is "two billion, six hundred six million, two hundred eighty-one thousand, eight hundred sixty-one".