12781504628 has 12 divisors (see below), whose sum is σ = 22383631200. Its totient is φ = 6386181432.

The previous prime is 12781504613. The next prime is 12781504717. The reversal of 12781504628 is 82640518721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136426 + ... + 1147617.

It is an arithmetic number, because the mean of its divisors is an integer number (1865302600).

Almost surely, 2^12781504628 is an apocalyptic number.

It is an amenable number.

12781504628 is a deficient number, since it is larger than the sum of its proper divisors (9602126572).

12781504628 is a wasteful number, since it uses less digits than its factorization.

12781504628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285446 (or 2285444 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 12781504628 in words is "twelve billion, seven hundred eighty-one million, five hundred four thousand, six hundred twenty-eight".