123531023502544 has 80 divisors (see below), whose sum is σ = 288864583483392. Its totient is φ = 50029925768064.

The previous prime is 123531023502541. The next prime is 123531023502553. The reversal of 123531023502544 is 445205320135321.

It is a junction number, because it is equal to n+sod(n) for n = 123531023502497 and 123531023502506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123531023502541) 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, 288669264 + ... + 289096879.

Almost surely, 2^{123531023502544} is an apocalyptic number.

123531023502544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

123531023502544 is an abundant number, since it is smaller than the sum of its proper divisors (165333559980848).

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

123531023502544 is a wasteful number, since it uses less digits than its factorization.

123531023502544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577766264 (or 577766258 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 123531023502544 its reverse (445205320135321), we get a palindrome (568736343637865).

The spelling of 123531023502544 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, twenty-three million, five hundred two thousand, five hundred forty-four".