123352340557 has 2 divisors, whose sum is σ = 123352340558. Its totient is φ = 123352340556.

The previous prime is 123352340509. The next prime is 123352340599. The reversal of 123352340557 is 755043253321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113637084201 + 9715256356 = 337101^2 + 98566^2 .

It is a cyclic number.

It is not a de Polignac number, because 123352340557 - 2²³ = 123343951949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123352340057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61676170278 + 61676170279.

It is an arithmetic number, because the mean of its divisors is an integer number (61676170279).

Almost surely, 2^123352340557 is an apocalyptic number.

It is an amenable number.

123352340557 is a deficient number, since it is larger than the sum of its proper divisors (1).

123352340557 is an equidigital number, since it uses as much as digits as its factorization.

123352340557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 40.

Adding to 123352340557 its reverse (755043253321), we get a palindrome (878395593878).

The spelling of 123352340557 in words is "one hundred twenty-three billion, three hundred fifty-two million, three hundred forty thousand, five hundred fifty-seven".