123331324340440 has 32 divisors (see below), whose sum is σ = 277496304256080. Its totient is φ = 49332383160192.

The previous prime is 123331324340431. The next prime is 123331324340447. The reversal of 123331324340440 is 44043423133321.

It is a self number, because there is not a number n which added to its sum of digits gives 123331324340440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123331324340447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9591787 + ... + 18402853.

Almost surely, 2^{123331324340440} is an apocalyptic number.

123331324340440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123331324340440 is an abundant number, since it is smaller than the sum of its proper divisors (154164979915640).

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

123331324340440 is a wasteful number, since it uses less digits than its factorization.

123331324340440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9161011 (or 9161007 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 37.

Adding to 123331324340440 its reverse (44043423133321), we get a palindrome (167374747473761).

The spelling of 123331324340440 in words is "one hundred twenty-three trillion, three hundred thirty-one billion, three hundred twenty-four million, three hundred forty thousand, four hundred forty".