12781588346 has 16 divisors (see below), whose sum is σ = 20308271400. Its totient is φ = 6012464640.

The previous prime is 12781588343. The next prime is 12781588349. The reversal of 12781588346 is 64388518721.

It is an interprime number because it is at equal distance from previous prime (12781588343) and next prime (12781588349).

It can be written as a sum of positive squares in 4 ways, for example, as 10949320321 + 1832268025 = 104639^2 + 42805^2 .

It is not an unprimeable number, because it can be changed into a prime (12781588343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12926 + ... + 160406.

Almost surely, 2^12781588346 is an apocalyptic number.

12781588346 is a deficient number, since it is larger than the sum of its proper divisors (7526683054).

12781588346 is a wasteful number, since it uses less digits than its factorization.

12781588346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150049.

The product of its digits is 2580480, while the sum is 53.

The spelling of 12781588346 in words is "twelve billion, seven hundred eighty-one million, five hundred eighty-eight thousand, three hundred forty-six".