123230815537 has 2 divisors, whose sum is σ = 123230815538. Its totient is φ = 123230815536.

The previous prime is 123230815459. The next prime is 123230815541. The reversal of 123230815537 is 735518032321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107193379216 + 16037436321 = 327404^2 + 126639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123230815537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123230815537.

It is not a weakly prime, because it can be changed into another prime (123230815577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61615407768 + 61615407769.

It is an arithmetic number, because the mean of its divisors is an integer number (61615407769).

Almost surely, 2^123230815537 is an apocalyptic number.

It is an amenable number.

123230815537 is a deficient number, since it is larger than the sum of its proper divisors (1).

123230815537 is an equidigital number, since it uses as much as digits as its factorization.

123230815537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

Adding to 123230815537 its reverse (735518032321), we get a palindrome (858748847858).

The spelling of 123230815537 in words is "one hundred twenty-three billion, two hundred thirty million, eight hundred fifteen thousand, five hundred thirty-seven".