13266443461 has 4 divisors (see below), whose sum is σ = 13267357452. Its totient is φ = 13265529472.

The previous prime is 13266443453. The next prime is 13266443479. The reversal of 13266443461 is 16434466231.

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 3542511361 + 9723932100 = 59519^2 + 98610^2 .

It is a cyclic number.

It is not a de Polignac number, because 13266443461 - 2³ = 13266443453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13266443161) 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, 434866 + ... + 464371.

It is an arithmetic number, because the mean of its divisors is an integer number (3316839363).

Almost surely, 2^13266443461 is an apocalyptic number.

It is an amenable number.

13266443461 is a deficient number, since it is larger than the sum of its proper divisors (913991).

13266443461 is an equidigital number, since it uses as much as digits as its factorization.

13266443461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913990.

The product of its digits is 248832, while the sum is 40.

The spelling of 13266443461 in words is "thirteen billion, two hundred sixty-six million, four hundred forty-three thousand, four hundred sixty-one".