123255435052049 has 2 divisors, whose sum is σ = 123255435052050. Its totient is φ = 123255435052048.

The previous prime is 123255435051961. The next prime is 123255435052067. The reversal of 123255435052049 is 940250534552321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112592153793025 + 10663281259024 = 10610945^2 + 3265468^2 .

It is an emirp because it is prime and its reverse (940250534552321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123255435052049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123255435051988 and 123255435052006.

It is not a weakly prime, because it can be changed into another prime (123255435052069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61627717526024 + 61627717526025.

It is an arithmetic number, because the mean of its divisors is an integer number (61627717526025).

Almost surely, 2^{123255435052049} is an apocalyptic number.

It is an amenable number.

123255435052049 is a deficient number, since it is larger than the sum of its proper divisors (1).

123255435052049 is an equidigital number, since it uses as much as digits as its factorization.

123255435052049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480000, while the sum is 50.

The spelling of 123255435052049 in words is "one hundred twenty-three trillion, two hundred fifty-five billion, four hundred thirty-five million, fifty-two thousand, forty-nine".