123542514512 has 80 divisors (see below), whose sum is σ = 255419402112. Its totient is φ = 57685770240.

The previous prime is 123542514499. The next prime is 123542514551. The reversal of 123542514512 is 215415245321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29114663 + ... + 29118905.

Almost surely, 2^123542514512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123542514512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127709701056).

123542514512 is an abundant number, since it is smaller than the sum of its proper divisors (131876887600).

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

123542514512 is a wasteful number, since it uses less digits than its factorization.

123542514512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076 (or 5070 counting only the distinct ones).

The product of its digits is 48000, while the sum is 35.

Adding to 123542514512 its reverse (215415245321), we get a palindrome (338957759833).

The spelling of 123542514512 in words is "one hundred twenty-three billion, five hundred forty-two million, five hundred fourteen thousand, five hundred twelve".