128572624123 has 4 divisors (see below), whose sum is σ = 135339604360. Its totient is φ = 121805643888.

The previous prime is 128572624111. The next prime is 128572624133. The reversal of 128572624123 is 321426275821.

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 128572624123 - 2⁵ = 128572624091 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 128572624123.

It is not an unprimeable number, because it can be changed into a prime (128572624133) 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, 3383490090 + ... + 3383490127.

It is an arithmetic number, because the mean of its divisors is an integer number (33834901090).

Almost surely, 2^128572624123 is an apocalyptic number.

128572624123 is a deficient number, since it is larger than the sum of its proper divisors (6766980237).

128572624123 is an equidigital number, since it uses as much as digits as its factorization.

128572624123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6766980236.

The product of its digits is 322560, while the sum is 43.

Adding to 128572624123 its reverse (321426275821), we get a palindrome (449998899944).

The spelling of 128572624123 in words is "one hundred twenty-eight billion, five hundred seventy-two million, six hundred twenty-four thousand, one hundred twenty-three".