41556045689 has 2 divisors, whose sum is σ = 41556045690. Its totient is φ = 41556045688.

The previous prime is 41556045611. The next prime is 41556045691. The reversal of 41556045689 is 98654065514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30487953664 + 11068092025 = 174608^2 + 105205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41556045689 is a prime.

Together with 41556045691, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 41556045689.

It is not a weakly prime, because it can be changed into another prime (41556045889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20778022844 + 20778022845.

It is an arithmetic number, because the mean of its divisors is an integer number (20778022845).

Almost surely, 2^41556045689 is an apocalyptic number.

It is an amenable number.

41556045689 is a deficient number, since it is larger than the sum of its proper divisors (1).

41556045689 is an equidigital number, since it uses as much as digits as its factorization.

41556045689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184000, while the sum is 53.

The spelling of 41556045689 in words is "forty-one billion, five hundred fifty-six million, forty-five thousand, six hundred eighty-nine".