6220636861 has 2 divisors, whose sum is σ = 6220636862. Its totient is φ = 6220636860.

The previous prime is 6220636783. The next prime is 6220636883. The reversal of 6220636861 is 1686360226.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6112268761 + 108368100 = 78181^2 + 10410^2 .

It is a cyclic number.

It is not a de Polignac number, because 6220636861 - 2⁹ = 6220636349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6220636061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3110318430 + 3110318431.

It is an arithmetic number, because the mean of its divisors is an integer number (3110318431).

Almost surely, 2^6220636861 is an apocalyptic number.

It is an amenable number.

6220636861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6220636861 is an equidigital number, since it uses as much as digits as its factorization.

6220636861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 6220636861 is about 78871.0140736126. The cubic root of 6220636861 is about 1839.1265605779.

The spelling of 6220636861 in words is "six billion, two hundred twenty million, six hundred thirty-six thousand, eight hundred sixty-one".