1311448461361 has 4 divisors (see below), whose sum is σ = 1341947262832. Its totient is φ = 1280949659892.

The previous prime is 1311448461251. The next prime is 1311448461403. The reversal of 1311448461361 is 1631648441131.

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 1311448461361 - 2²⁷ = 1311314243633 is a prime.

It is a super-2 number, since 2×1311448461361² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 30498801427 = 1311448461361 / (1 + 3 + 1 + 1 + 4 + 4 + 8 + 4 + 6 + 1 + 3 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311448467361) 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, 15249400671 + ... + 15249400756.

It is an arithmetic number, because the mean of its divisors is an integer number (335486815708).

Almost surely, 2^{1311448461361} is an apocalyptic number.

It is an amenable number.

1311448461361 is a deficient number, since it is larger than the sum of its proper divisors (30498801471).

1311448461361 is an equidigital number, since it uses as much as digits as its factorization.

1311448461361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30498801470.

The product of its digits is 165888, while the sum is 43.

The spelling of 1311448461361 in words is "one trillion, three hundred eleven billion, four hundred forty-eight million, four hundred sixty-one thousand, three hundred sixty-one".