12778585044 has 24 divisors (see below), whose sum is σ = 30111916128. Its totient is φ = 4217354400.

The previous prime is 12778585013. The next prime is 12778585063. The reversal of 12778585044 is 44058587721.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5270482 + ... + 5272905.

It is an arithmetic number, because the mean of its divisors is an integer number (1254663172).

Almost surely, 2^12778585044 is an apocalyptic number.

It is an amenable number.

12778585044 is an abundant number, since it is smaller than the sum of its proper divisors (17333331084).

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

12778585044 is a wasteful number, since it uses less digits than its factorization.

12778585044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10543495 (or 10543493 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 51.

The spelling of 12778585044 in words is "twelve billion, seven hundred seventy-eight million, five hundred eighty-five thousand, forty-four".