12798774128 has 30 divisors (see below), whose sum is σ = 28846218456. Its totient is φ = 5485188576.

The previous prime is 12798774119. The next prime is 12798774161. The reversal of 12798774128 is 82147789721.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8161700 + ... + 8163267.

Almost surely, 2^12798774128 is an apocalyptic number.

It is an amenable number.

12798774128 is an abundant number, since it is smaller than the sum of its proper divisors (16047444328).

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

12798774128 is a wasteful number, since it uses less digits than its factorization.

12798774128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16324989 (or 16324976 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 56.

The spelling of 12798774128 in words is "twelve billion, seven hundred ninety-eight million, seven hundred seventy-four thousand, one hundred twenty-eight".