12940958609 has 4 divisors (see below), whose sum is σ = 12941349300. Its totient is φ = 12940567920.

The previous prime is 12940958567. The next prime is 12940958621. The reversal of 12940958609 is 90685904921.

12940958609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90685904921 = 7451 ⋅12170971.

It can be written as a sum of positive squares in 2 ways, for example, as 12459024400 + 481934209 = 111620^2 + 21953^2 .

It is a cyclic number.

It is not a de Polignac number, because 12940958609 - 2²⁰ = 12939910033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12940958659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140534 + ... + 213615.

It is an arithmetic number, because the mean of its divisors is an integer number (3235337325).

Almost surely, 2^12940958609 is an apocalyptic number.

It is an amenable number.

12940958609 is a deficient number, since it is larger than the sum of its proper divisors (390691).

12940958609 is an equidigital number, since it uses as much as digits as its factorization.

12940958609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390690.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 12940958609 in words is "twelve billion, nine hundred forty million, nine hundred fifty-eight thousand, six hundred nine".