1345563561889 has 4 divisors (see below), whose sum is σ = 1345678805524. Its totient is φ = 1345448318256.

The previous prime is 1345563561887. The next prime is 1345563561899. The reversal of 1345563561889 is 9881653655431.

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 1085149307025 + 260414254864 = 1041705^2 + 510308^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345563561889 - 2¹ = 1345563561887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1345563561889.

It is not an unprimeable number, because it can be changed into a prime (1345563561883) 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, 57604302 + ... + 57627655.

It is an arithmetic number, because the mean of its divisors is an integer number (336419701381).

Almost surely, 2^{1345563561889} is an apocalyptic number.

It is an amenable number.

1345563561889 is a deficient number, since it is larger than the sum of its proper divisors (115243635).

1345563561889 is a wasteful number, since it uses less digits than its factorization.

1345563561889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115243634.

The product of its digits is 93312000, while the sum is 64.

The spelling of 1345563561889 in words is "one trillion, three hundred forty-five billion, five hundred sixty-three million, five hundred sixty-one thousand, eight hundred eighty-nine".