12810967745 has 4 divisors (see below), whose sum is σ = 15373161300. Its totient is φ = 10248774192.

The previous prime is 12810967739. The next prime is 12810967751. The reversal of 12810967745 is 54776901821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12810967739) and next prime (12810967751).

It can be written as a sum of positive squares in 2 ways, for example, as 6265672336 + 6545295409 = 79156^2 + 80903^2 .

It is a cyclic number.

It is not a de Polignac number, because 12810967745 - 2²⁴ = 12794190529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12810967693 and 12810967702.

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, 1281096770 + ... + 1281096779.

It is an arithmetic number, because the mean of its divisors is an integer number (3843290325).

Almost surely, 2^12810967745 is an apocalyptic number.

It is an amenable number.

12810967745 is a deficient number, since it is larger than the sum of its proper divisors (2562193555).

12810967745 is an equidigital number, since it uses as much as digits as its factorization.

12810967745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562193554.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 12810967745 in words is "twelve billion, eight hundred ten million, nine hundred sixty-seven thousand, seven hundred forty-five".