2606041861 has 2 divisors, whose sum is σ = 2606041862. Its totient is φ = 2606041860.

The previous prime is 2606041813. The next prime is 2606041897. The reversal of 2606041861 is 1681406062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1868919361 + 737122500 = 43231^2 + 27150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2606041861 - 2¹⁵ = 2606009093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2606041261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1303020930 + 1303020931.

It is an arithmetic number, because the mean of its divisors is an integer number (1303020931).

Almost surely, 2^2606041861 is an apocalyptic number.

It is an amenable number.

2606041861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2606041861 is an equidigital number, since it uses as much as digits as its factorization.

2606041861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 2606041861 is about 51049.4060788174. The cubic root of 2606041861 is about 1376.1331680893.

The spelling of 2606041861 in words is "two billion, six hundred six million, forty-one thousand, eight hundred sixty-one".