12958077709 has 6 divisors (see below), whose sum is σ = 13545968366. Its totient is φ = 12394682520.

The previous prime is 12958077703. The next prime is 12958077721. The reversal of 12958077709 is 90777085921.

It can be written as a sum of positive squares in only one way, i.e., 9717622084 + 3240455625 = 98578^2 + 56925^2 .

It is not a de Polignac number, because 12958077709 - 2¹⁵ = 12958044941 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 12958077709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12958077703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12247182 + ... + 12248239.

Almost surely, 2^12958077709 is an apocalyptic number.

It is an amenable number.

12958077709 is a deficient number, since it is larger than the sum of its proper divisors (587890657).

12958077709 is an equidigital number, since it uses as much as digits as its factorization.

12958077709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24495467 (or 24495444 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 55.

The spelling of 12958077709 in words is "twelve billion, nine hundred fifty-eight million, seventy-seven thousand, seven hundred nine".