123343042032440 has 32 divisors (see below), whose sum is σ = 284290670054160. Its totient is φ = 48133870060800.

The previous prime is 123343042032437. The next prime is 123343042032473. The reversal of 123343042032440 is 44230240343321.

It is a self number, because there is not a number n which added to its sum of digits gives 123343042032440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37604584346 + ... + 37604587625.

Almost surely, 2^{123343042032440} is an apocalyptic number.

123343042032440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123343042032440 is an abundant number, since it is smaller than the sum of its proper divisors (160947628021720).

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

123343042032440 is a wasteful number, since it uses less digits than its factorization.

123343042032440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75209172023 (or 75209172019 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 35.

Adding to 123343042032440 its reverse (44230240343321), we get a palindrome (167573282375761).

The spelling of 123343042032440 in words is "one hundred twenty-three trillion, three hundred forty-three billion, forty-two million, thirty-two thousand, four hundred forty".