6122865781 has 2 divisors, whose sum is σ = 6122865782. Its totient is φ = 6122865780.

The previous prime is 6122865751. The next prime is 6122865851. The reversal of 6122865781 is 1875682216.

6122865781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4789885681 + 1332980100 = 69209^2 + 36510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6122865781 is a prime.

It is a super-2 number, since 2×6122865781² = 74978970744281479922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6122865751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3061432890 + 3061432891.

It is an arithmetic number, because the mean of its divisors is an integer number (3061432891).

Almost surely, 2^6122865781 is an apocalyptic number.

It is an amenable number.

6122865781 is a deficient number, since it is larger than the sum of its proper divisors (1).

6122865781 is an equidigital number, since it uses as much as digits as its factorization.

6122865781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 46.

The square root of 6122865781 is about 78248.7429994885. The cubic root of 6122865781 is about 1829.4403198540.

The spelling of 6122865781 in words is "six billion, one hundred twenty-two million, eight hundred sixty-five thousand, seven hundred eighty-one".