123566214641 has 2 divisors, whose sum is σ = 123566214642. Its totient is φ = 123566214640.

The previous prime is 123566214619. The next prime is 123566214649. The reversal of 123566214641 is 146412665321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96801254641 + 26764960000 = 311129^2 + 163600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123566214641 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (123566214649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61783107320 + 61783107321.

It is an arithmetic number, because the mean of its divisors is an integer number (61783107321).

Almost surely, 2^123566214641 is an apocalyptic number.

It is an amenable number.

123566214641 is a deficient number, since it is larger than the sum of its proper divisors (1).

123566214641 is an equidigital number, since it uses as much as digits as its factorization.

123566214641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 41.

Adding to 123566214641 its reverse (146412665321), we get a palindrome (269978879962).

The spelling of 123566214641 in words is "one hundred twenty-three billion, five hundred sixty-six million, two hundred fourteen thousand, six hundred forty-one".