123144443240 has 256 divisors, whose sum is σ = 344574397440. Its totient is φ = 38568960000.

The previous prime is 123144443231. The next prime is 123144443263. The reversal of 123144443240 is 42344441321.

It is a junction number, because it is equal to n+sod(n) for n = 123144443197 and 123144443206.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 204898940 + ... + 204899540.

It is an arithmetic number, because the mean of its divisors is an integer number (1345993740).

Almost surely, 2^123144443240 is an apocalyptic number.

123144443240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123144443240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172287198720).

123144443240 is an abundant number, since it is smaller than the sum of its proper divisors (221429954200).

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

123144443240 is a wasteful number, since it uses less digits than its factorization.

123144443240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 123144443240 its reverse (42344441321), we get a palindrome (165488884561).

The spelling of 123144443240 in words is "one hundred twenty-three billion, one hundred forty-four million, four hundred forty-three thousand, two hundred forty".