123564161141 has 2 divisors, whose sum is σ = 123564161142. Its totient is φ = 123564161140.

The previous prime is 123564161117. The next prime is 123564161183. The reversal of 123564161141 is 141161465321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62033374225 + 61530786916 = 249065^2 + 248054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123564161141 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123564121141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61782080570 + 61782080571.

It is an arithmetic number, because the mean of its divisors is an integer number (61782080571).

Almost surely, 2^123564161141 is an apocalyptic number.

It is an amenable number.

123564161141 is a deficient number, since it is larger than the sum of its proper divisors (1).

123564161141 is an equidigital number, since it uses as much as digits as its factorization.

123564161141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The spelling of 123564161141 in words is "one hundred twenty-three billion, five hundred sixty-four million, one hundred sixty-one thousand, one hundred forty-one".