123255432754789 has 2 divisors, whose sum is σ = 123255432754790. Its totient is φ = 123255432754788.

The previous prime is 123255432754763. The next prime is 123255432754793. The reversal of 123255432754789 is 987457234552321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118493195869764 + 4762236885025 = 10885458^2 + 2182255^2 .

It is a cyclic number.

It is not a de Polignac number, because 123255432754789 - 2⁵ = 123255432754757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123255432754739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61627716377394 + 61627716377395.

It is an arithmetic number, because the mean of its divisors is an integer number (61627716377395).

Almost surely, 2^{123255432754789} is an apocalyptic number.

It is an amenable number.

123255432754789 is a deficient number, since it is larger than the sum of its proper divisors (1).

123255432754789 is an equidigital number, since it uses as much as digits as its factorization.

123255432754789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032000, while the sum is 67.

The spelling of 123255432754789 in words is "one hundred twenty-three trillion, two hundred fifty-five billion, four hundred thirty-two million, seven hundred fifty-four thousand, seven hundred eighty-nine".