123255434542105 has 64 divisors (see below), whose sum is σ = 158742872064000. Its totient is φ = 91601510128128.

The previous prime is 123255434542069. The next prime is 123255434542127. The reversal of 123255434542105 is 501245434552321.

It is a cyclic number.

It is not a de Polignac number, because 123255434542105 - 2⁷ = 123255434541977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2885238936 + ... + 2885281654.

It is an arithmetic number, because the mean of its divisors is an integer number (2480357376000).

Almost surely, 2^{123255434542105} is an apocalyptic number.

It is an amenable number.

123255434542105 is a deficient number, since it is larger than the sum of its proper divisors (35487437521895).

123255434542105 is a wasteful number, since it uses less digits than its factorization.

123255434542105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45646.

The product of its (nonzero) digits is 2880000, while the sum is 46.

The spelling of 123255434542105 in words is "one hundred twenty-three trillion, two hundred fifty-five billion, four hundred thirty-four million, five hundred forty-two thousand, one hundred five".