1645112330569 has 2 divisors, whose sum is σ = 1645112330570. Its totient is φ = 1645112330568.

The previous prime is 1645112330509. The next prime is 1645112330683. The reversal of 1645112330569 is 9650332115461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1416130940169 + 228981390400 = 1190013^2 + 478520^2 .

It is an emirp because it is prime and its reverse (9650332115461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1645112330569 - 2¹¹ = 1645112328521 is a prime.

It is a super-2 number, since 2×1645112330569² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1645112330509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822556165284 + 822556165285.

It is an arithmetic number, because the mean of its divisors is an integer number (822556165285).

Almost surely, 2^{1645112330569} is an apocalyptic number.

It is an amenable number.

1645112330569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645112330569 is an equidigital number, since it uses as much as digits as its factorization.

1645112330569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 1645112330569 in words is "one trillion, six hundred forty-five billion, one hundred twelve million, three hundred thirty thousand, five hundred sixty-nine".