6561106103 has 2 divisors, whose sum is σ = 6561106104. Its totient is φ = 6561106102.

The previous prime is 6561106099. The next prime is 6561106117. The reversal of 6561106103 is 3016011656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6561106103 - 2² = 6561106099 is a prime.

It is a super-2 number, since 2×6561106103² = 86096226589647693218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6561106193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280553051 + 3280553052.

It is an arithmetic number, because the mean of its divisors is an integer number (3280553052).

Almost surely, 2^6561106103 is an apocalyptic number.

6561106103 is a deficient number, since it is larger than the sum of its proper divisors (1).

6561106103 is an equidigital number, since it uses as much as digits as its factorization.

6561106103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 6561106103 is about 81000.6549541422. The cubic root of 6561106103 is about 1872.0855322851.

Adding to 6561106103 its reverse (3016011656), we get a palindrome (9577117759).

The spelling of 6561106103 in words is "six billion, five hundred sixty-one million, one hundred six thousand, one hundred three".