123340502543 has 16 divisors (see below), whose sum is σ = 138472765920. Its totient is φ = 109172653056.

The previous prime is 123340502531. The next prime is 123340502561. The reversal of 123340502543 is 345205043321.

It is not a de Polignac number, because 123340502543 - 2⁸ = 123340502287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123340502513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1349396 + ... + 1437897.

It is an arithmetic number, because the mean of its divisors is an integer number (8654547870).

Almost surely, 2^123340502543 is an apocalyptic number.

123340502543 is a deficient number, since it is larger than the sum of its proper divisors (15132263377).

123340502543 is a wasteful number, since it uses less digits than its factorization.

123340502543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787466.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 123340502543 its reverse (345205043321), we get a palindrome (468545545864).

The spelling of 123340502543 in words is "one hundred twenty-three billion, three hundred forty million, five hundred two thousand, five hundred forty-three".