135569645569 has 4 divisors (see below), whose sum is σ = 135923613696. Its totient is φ = 135215677444.

The previous prime is 135569645567. The next prime is 135569645611. The reversal of 135569645569 is 965546965531.

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 135569645569 - 2¹ = 135569645567 is a prime.

It is a super-2 number, since 2×135569645569² (a number of 23 digits) contains 22 as substring.

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 135569645569.

It is not an unprimeable number, because it can be changed into a prime (135569645567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176983489 + ... + 176984254.

It is an arithmetic number, because the mean of its divisors is an integer number (33980903424).

Almost surely, 2^135569645569 is an apocalyptic number.

It is an amenable number.

135569645569 is a deficient number, since it is larger than the sum of its proper divisors (353968127).

135569645569 is an equidigital number, since it uses as much as digits as its factorization.

135569645569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353968126.

The product of its digits is 131220000, while the sum is 64.

The spelling of 135569645569 in words is "one hundred thirty-five billion, five hundred sixty-nine million, six hundred forty-five thousand, five hundred sixty-nine".