12510780640873 has 4 divisors (see below), whose sum is σ = 12639757760980. Its totient is φ = 12381803520768.

The previous prime is 12510780640843. The next prime is 12510780640933. The reversal of 12510780640873 is 37804608701521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2085837843049 + 10424942797824 = 1444243^2 + 3228768^2 .

It is a cyclic number.

It is not a de Polignac number, because 12510780640873 - 2²¹ = 12510778543721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12510780640873.

It is not an unprimeable number, because it can be changed into a prime (12510780640843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64488559908 + ... + 64488560101.

It is an arithmetic number, because the mean of its divisors is an integer number (3159939440245).

Almost surely, 2^{12510780640873} is an apocalyptic number.

It is an amenable number.

12510780640873 is a deficient number, since it is larger than the sum of its proper divisors (128977120107).

12510780640873 is an equidigital number, since it uses as much as digits as its factorization.

12510780640873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128977120106.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 12510780640873 in words is "twelve trillion, five hundred ten billion, seven hundred eighty million, six hundred forty thousand, eight hundred seventy-three".