12780380425 has 6 divisors (see below), whose sum is σ = 15847671758. Its totient is φ = 10224304320.

The previous prime is 12780380401. The next prime is 12780380443. The reversal of 12780380425 is 52408308721.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 61277584 + 12719102841 = 7828^2 + 112779^2 .

It is not a de Polignac number, because 12780380425 - 2²⁹ = 12243509513 is a prime.

It is a Duffinian 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, 255607584 + ... + 255607633.

Almost surely, 2^12780380425 is an apocalyptic number.

It is an amenable number.

12780380425 is a deficient number, since it is larger than the sum of its proper divisors (3067291333).

12780380425 is an equidigital number, since it uses as much as digits as its factorization.

12780380425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511215227 (or 511215222 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 12780380425 in words is "twelve billion, seven hundred eighty million, three hundred eighty thousand, four hundred twenty-five".