123405544435023 has 24 divisors (see below), whose sum is σ = 184145059877376. Its totient is φ = 79554809653200.

The previous prime is 123405544435007. The next prime is 123405544435039. The reversal of 123405544435023 is 320534445504321.

123405544435023 is a `hidden beast` number, since 1 + 2 + 3 + 4 + 0 + 554 + 4 + 43 + 50 + 2 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (123405544435007) and next prime (123405544435039).

It is not a de Polignac number, because 123405544435023 - 2⁴ = 123405544435007 is a prime.

It is a super-2 number, since 2×123405544435023² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123405544435023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123405544435093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 170946465 + ... + 171666842.

It is an arithmetic number, because the mean of its divisors is an integer number (7672710828224).

Almost surely, 2^{123405544435023} is an apocalyptic number.

123405544435023 is a deficient number, since it is larger than the sum of its proper divisors (60739515442353).

123405544435023 is a wasteful number, since it uses less digits than its factorization.

123405544435023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342614635 (or 342614632 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 45.

Adding to 123405544435023 its reverse (320534445504321), we get a palindrome (443939989939344).

The spelling of 123405544435023 in words is "one hundred twenty-three trillion, four hundred five billion, five hundred forty-four million, four hundred thirty-five thousand, twenty-three".