6240805861 has 2 divisors, whose sum is σ = 6240805862. Its totient is φ = 6240805860.

The previous prime is 6240805853. The next prime is 6240805867. The reversal of 6240805861 is 1685080426.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5071576225 + 1169229636 = 71215^2 + 34194^2 .

It is a cyclic number.

It is not a de Polignac number, because 6240805861 - 2³ = 6240805853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6240805867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3120402930 + 3120402931.

It is an arithmetic number, because the mean of its divisors is an integer number (3120402931).

Almost surely, 2^6240805861 is an apocalyptic number.

It is an amenable number.

6240805861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6240805861 is an equidigital number, since it uses as much as digits as its factorization.

6240805861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 6240805861 is about 78998.7712625962. The cubic root of 6240805861 is about 1841.1120661124.

The spelling of 6240805861 in words is "six billion, two hundred forty million, eight hundred five thousand, eight hundred sixty-one".