123243504444540 has 72 divisors (see below), whose sum is σ = 374039511675648. Its totient is φ = 32847274604160.

The previous prime is 123243504444469. The next prime is 123243504444559. The reversal of 123243504444540 is 45444405342321.

123243504444540 is a `hidden beast` number, since 1 + 2 + 3 + 24 + 3 + 5 + 0 + 44 + 44 + 540 = 666.

123243504444540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×123243504444540² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183621532 + ... + 184291491.

Almost surely, 2^{123243504444540} is an apocalyptic number.

123243504444540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123243504444540 is an abundant number, since it is smaller than the sum of its proper divisors (250796007231108).

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

123243504444540 is a wasteful number, since it uses less digits than its factorization.

123243504444540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367914899 (or 367914894 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 45.

Adding to 123243504444540 its reverse (45444405342321), we get a palindrome (168687909786861).

The spelling of 123243504444540 in words is "one hundred twenty-three trillion, two hundred forty-three billion, five hundred four million, four hundred forty-four thousand, five hundred forty".