12128233478 has 16 divisors (see below), whose sum is σ = 19286749824. Its totient is φ = 5709890880.

The previous prime is 12128233471. The next prime is 12128233519. The reversal of 12128233478 is 87433282121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12128233471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2641175 + ... + 2645762.

It is an arithmetic number, because the mean of its divisors is an integer number (1205421864).

Almost surely, 2^12128233478 is an apocalyptic number.

12128233478 is a deficient number, since it is larger than the sum of its proper divisors (7158516346).

12128233478 is a wasteful number, since it uses less digits than its factorization.

12128233478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287007.

The product of its digits is 129024, while the sum is 41.

The spelling of 12128233478 in words is "twelve billion, one hundred twenty-eight million, two hundred thirty-three thousand, four hundred seventy-eight".