123140321303440 has 160 divisors (see below), whose sum is σ = 328337218215936. Its totient is φ = 42073059225600.

The previous prime is 123140321303437. The next prime is 123140321303459. The reversal of 123140321303440 is 44303123041321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 648616369 + ... + 648806191.

Almost surely, 2^{123140321303440} is an apocalyptic number.

123140321303440 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 123140321303440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164168609107968).

123140321303440 is an abundant number, since it is smaller than the sum of its proper divisors (205196896912496).

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

123140321303440 is a wasteful number, since it uses less digits than its factorization.

123140321303440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193857 (or 193851 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 123140321303440 its reverse (44303123041321), we get a palindrome (167443444344761).

The spelling of 123140321303440 in words is "one hundred twenty-three trillion, one hundred forty billion, three hundred twenty-one million, three hundred three thousand, four hundred forty".