123240355440143 has 4 divisors (see below), whose sum is σ = 123249917122320. Its totient is φ = 123230793757968.

The previous prime is 123240355440089. The next prime is 123240355440161. The reversal of 123240355440143 is 341044553042321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123240355440143 - 2¹⁰ = 123240355439119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123240355440143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123240355440173) 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, 4780821755 + ... + 4780847532.

It is an arithmetic number, because the mean of its divisors is an integer number (30812479280580).

Almost surely, 2^{123240355440143} is an apocalyptic number.

123240355440143 is a deficient number, since it is larger than the sum of its proper divisors (9561682177).

123240355440143 is an equidigital number, since it uses as much as digits as its factorization.

123240355440143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9561682176.

The product of its (nonzero) digits is 691200, while the sum is 41.

The spelling of 123240355440143 in words is "one hundred twenty-three trillion, two hundred forty billion, three hundred fifty-five million, four hundred forty thousand, one hundred forty-three".