1266443365313 has 4 divisors (see below), whose sum is σ = 1447363846080. Its totient is φ = 1085522884548.

The previous prime is 1266443365309. The next prime is 1266443365349. The reversal of 1266443365313 is 3135633446621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1266443365313 - 2² = 1266443365309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266443365013) 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, 90460240373 + ... + 90460240386.

It is an arithmetic number, because the mean of its divisors is an integer number (361840961520).

Almost surely, 2^{1266443365313} is an apocalyptic number.

It is an amenable number.

1266443365313 is a deficient number, since it is larger than the sum of its proper divisors (180920480767).

1266443365313 is an equidigital number, since it uses as much as digits as its factorization.

1266443365313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180920480766.

The product of its digits is 2799360, while the sum is 47.

The spelling of 1266443365313 in words is "one trillion, two hundred sixty-six billion, four hundred forty-three million, three hundred sixty-five thousand, three hundred thirteen".