2606781811 has 2 divisors, whose sum is σ = 2606781812. Its totient is φ = 2606781810.

The previous prime is 2606781773. The next prime is 2606781851. The reversal of 2606781811 is 1181876062.

2606781811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2606781851) can be obtained adding 2606781811 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2606781811 - 2¹⁹ = 2606257523 is a prime.

It is a super-2 number, since 2×2606781811² = 13590622820320879442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2606781851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1303390905 + 1303390906.

It is an arithmetic number, because the mean of its divisors is an integer number (1303390906).

Almost surely, 2^2606781811 is an apocalyptic number.

2606781811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2606781811 is an equidigital number, since it uses as much as digits as its factorization.

2606781811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 2606781811 is about 51056.6529553201. The cubic root of 2606781811 is about 1376.2634005047.

The spelling of 2606781811 in words is "two billion, six hundred six million, seven hundred eighty-one thousand, eight hundred eleven".