123243502450540 has 48 divisors (see below), whose sum is σ = 258996408098400. Its totient is φ = 49262159665152.

The previous prime is 123243502450427. The next prime is 123243502450571. The reversal of 123243502450540 is 45054205342321.

It is a junction number, because it is equal to n+sod(n) for n = 123243502450493 and 123243502450502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294168892 + ... + 294587548.

It is an arithmetic number, because the mean of its divisors is an integer number (5395758502050).

Almost surely, 2^{123243502450540} is an apocalyptic number.

123243502450540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123243502450540 is an abundant number, since it is smaller than the sum of its proper divisors (135752905647860).

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

123243502450540 is a wasteful number, since it uses less digits than its factorization.

123243502450540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429154 (or 429152 counting only the distinct ones).

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

Adding to 123243502450540 its reverse (45054205342321), we get a palindrome (168297707792861).

The spelling of 123243502450540 in words is "one hundred twenty-three trillion, two hundred forty-three billion, five hundred two million, four hundred fifty thousand, five hundred forty".