1347813043561 has 4 divisors (see below), whose sum is σ = 1347822688212. Its totient is φ = 1347803398912.

The previous prime is 1347813043529. The next prime is 1347813043601. The reversal of 1347813043561 is 1653403187431.

It is a happy number.

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 768112016400 + 579701027161 = 876420^2 + 761381^2 .

It is a cyclic number.

It is not a de Polignac number, because 1347813043561 - 2⁵ = 1347813043529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1347813043261) 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, 4609576 + ... + 4893241.

It is an arithmetic number, because the mean of its divisors is an integer number (336955672053).

Almost surely, 2^{1347813043561} is an apocalyptic number.

It is an amenable number.

1347813043561 is a deficient number, since it is larger than the sum of its proper divisors (9644651).

1347813043561 is an equidigital number, since it uses as much as digits as its factorization.

1347813043561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9644650.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 1347813043561 in words is "one trillion, three hundred forty-seven billion, eight hundred thirteen million, forty-three thousand, five hundred sixty-one".