123243540255040 has 56 divisors (see below), whose sum is σ = 294102103887072. Its totient is φ = 49191854123520.

The previous prime is 123243540255037. The next prime is 123243540255047. The reversal of 123243540255040 is 40552045342321.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 123243540254984 and 123243540255002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123243540255047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412201806 + ... + 412500685.

Almost surely, 2^{123243540255040} is an apocalyptic number.

123243540255040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123243540255040 is an abundant number, since it is smaller than the sum of its proper divisors (170858563632032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123243540255040 is an equidigital number, since it uses as much as digits as its factorization.

123243540255040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824702975 (or 824702965 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 40.

Adding to 123243540255040 its reverse (40552045342321), we get a palindrome (163795585597361).

The spelling of 123243540255040 in words is "one hundred twenty-three trillion, two hundred forty-three billion, five hundred forty million, two hundred fifty-five thousand, forty".