123244423454440 has 16 divisors (see below), whose sum is σ = 277299952772580. Its totient is φ = 49297769381760.

The previous prime is 123244423454431. The next prime is 123244423454441. The reversal of 123244423454440 is 44454324442321.

It can be written as a sum of positive squares in 2 ways, for example, as 106467191070436 + 16777232384004 = 10318294^2 + 4096002^2 .

It is not an unprimeable number, because it can be changed into a prime (123244423454441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540555293141 + ... + 1540555293220.

Almost surely, 2^{123244423454440} is an apocalyptic number.

123244423454440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123244423454440 is an abundant number, since it is smaller than the sum of its proper divisors (154055529318140).

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

123244423454440 is a wasteful number, since it uses less digits than its factorization.

123244423454440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3081110586372 (or 3081110586368 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 46.

Adding to 123244423454440 its reverse (44454324442321), we get a palindrome (167698747896761).

The spelling of 123244423454440 in words is "one hundred twenty-three trillion, two hundred forty-four billion, four hundred twenty-three million, four hundred fifty-four thousand, four hundred forty".