123368362561 has 2 divisors, whose sum is σ = 123368362562. Its totient is φ = 123368362560.

The previous prime is 123368362529. The next prime is 123368362633. The reversal of 123368362561 is 165263863321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116472720961 + 6895641600 = 341281^2 + 83040^2 .

It is a cyclic number.

It is not a de Polignac number, because 123368362561 - 2⁵ = 123368362529 is a prime.

It is not a weakly prime, because it can be changed into another prime (123368362501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61684181280 + 61684181281.

It is an arithmetic number, because the mean of its divisors is an integer number (61684181281).

Almost surely, 2^123368362561 is an apocalyptic number.

It is an amenable number.

123368362561 is a deficient number, since it is larger than the sum of its proper divisors (1).

123368362561 is an equidigital number, since it uses as much as digits as its factorization.

123368362561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 46.

The spelling of 123368362561 in words is "one hundred twenty-three billion, three hundred sixty-eight million, three hundred sixty-two thousand, five hundred sixty-one".