123403423010240 has 56 divisors (see below), whose sum is σ = 293860918286640. Its totient is φ = 49360274444288.

The previous prime is 123403423010233. The next prime is 123403423010249. The reversal of 123403423010240 is 42010324304321.

It is a super-2 number, since 2×123403423010240² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123403423010249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10251539 + ... + 18759021.

Almost surely, 2^{123403423010240} is an apocalyptic number.

123403423010240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123403423010240 is an abundant number, since it is smaller than the sum of its proper divisors (170457495276400).

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

123403423010240 is an equidigital number, since it uses as much as digits as its factorization.

123403423010240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8552829 (or 8552819 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 123403423010240 its reverse (42010324304321), we get a palindrome (165413747314561).

The spelling of 123403423010240 in words is "one hundred twenty-three trillion, four hundred three billion, four hundred twenty-three million, ten thousand, two hundred forty".