123315403205240 has 64 divisors (see below), whose sum is σ = 280093214412000. Its totient is φ = 48858257963520.

The previous prime is 123315403205227. The next prime is 123315403205257. The reversal of 123315403205240 is 42502304513321.

It is a self number, because there is not a number n which added to its sum of digits gives 123315403205240.

It is a congruent number.

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, 9423491 + ... + 18314829.

Almost surely, 2^{123315403205240} is an apocalyptic number.

123315403205240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123315403205240 is an abundant number, since it is smaller than the sum of its proper divisors (156777811206760).

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

123315403205240 is a wasteful number, since it uses less digits than its factorization.

123315403205240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8894640 (or 8894636 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 123315403205240 its reverse (42502304513321), we get a palindrome (165817707718561).

The spelling of 123315403205240 in words is "one hundred twenty-three trillion, three hundred fifteen billion, four hundred three million, two hundred five thousand, two hundred forty".