123503533504 has 56 divisors (see below), whose sum is σ = 275404661280. Its totient is φ = 54523290624.

The previous prime is 123503533499. The next prime is 123503533547. The reversal of 123503533504 is 405335305321.

It is a self number, because there is not a number n which added to its sum of digits gives 123503533504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3207859 + ... + 3246130.

It is an arithmetic number, because the mean of its divisors is an integer number (4917940380).

Almost surely, 2^123503533504 is an apocalyptic number.

It is an amenable number.

123503533504 is an abundant number, since it is smaller than the sum of its proper divisors (151901127776).

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

123503533504 is a wasteful number, since it uses less digits than its factorization.

123503533504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454037 (or 6454027 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 34.

Adding to 123503533504 its reverse (405335305321), we get a palindrome (528838838825).

The spelling of 123503533504 in words is "one hundred twenty-three billion, five hundred three million, five hundred thirty-three thousand, five hundred four".