12784455625 has 10 divisors (see below), whose sum is σ = 15975456530. Its totient is φ = 10227564000.

The previous prime is 12784455601. The next prime is 12784455659. The reversal of 12784455625 is 52655448721.

It can be written as a sum of positive squares in 5 ways, for example, as 3638019856 + 9146435769 = 60316^2 + 95637^2 .

It is not a de Polignac number, because 12784455625 - 2⁹ = 12784455113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10226940 + ... + 10228189.

It is an arithmetic number, because the mean of its divisors is an integer number (1597545653).

Almost surely, 2^12784455625 is an apocalyptic number.

It is an amenable number.

12784455625 is a deficient number, since it is larger than the sum of its proper divisors (3191000905).

12784455625 is an frugal number, since it uses more digits than its factorization.

12784455625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20455149 (or 20455134 counting only the distinct ones).

The product of its digits is 2688000, while the sum is 49.

The spelling of 12784455625 in words is "twelve billion, seven hundred eighty-four million, four hundred fifty-five thousand, six hundred twenty-five".