1345043411549 has 4 divisors (see below), whose sum is σ = 1363468663836. Its totient is φ = 1326618159264.

The previous prime is 1345043411513. The next prime is 1345043411587. The reversal of 1345043411549 is 9451143405431.

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 462114444100 + 882928967449 = 679790^2 + 939643^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345043411549 - 2⁸ = 1345043411293 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 (1345043411599) 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, 9212626034 + ... + 9212626179.

It is an arithmetic number, because the mean of its divisors is an integer number (340867165959).

Almost surely, 2^{1345043411549} is an apocalyptic number.

It is an amenable number.

1345043411549 is a deficient number, since it is larger than the sum of its proper divisors (18425252287).

1345043411549 is an equidigital number, since it uses as much as digits as its factorization.

1345043411549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18425252286.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 1345043411549 in words is "one trillion, three hundred forty-five billion, forty-three million, four hundred eleven thousand, five hundred forty-nine".