123243431320340 has 48 divisors (see below), whose sum is σ = 259536967022592. Its totient is φ = 49159181913216.

The previous prime is 123243431320319. The next prime is 123243431320391. The reversal of 123243431320340 is 43023134342321.

It is a super-3 number, since 3×123243431320340³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 123243431320340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38261087 + ... + 41356953.

It is an arithmetic number, because the mean of its divisors is an integer number (5407020146304).

Almost surely, 2^{123243431320340} is an apocalyptic number.

123243431320340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123243431320340 is an abundant number, since it is smaller than the sum of its proper divisors (136293535702252).

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

123243431320340 is a wasteful number, since it uses less digits than its factorization.

123243431320340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101456 (or 3101454 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 123243431320340 its reverse (43023134342321), we get a palindrome (166266565662661).

The spelling of 123243431320340 in words is "one hundred twenty-three trillion, two hundred forty-three billion, four hundred thirty-one million, three hundred twenty thousand, three hundred forty".