8505725759 has 4 divisors (see below), whose sum is σ = 8553243960. Its totient is φ = 8458207560.

The previous prime is 8505725741. The next prime is 8505725771. The reversal of 8505725759 is 9575275058.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8505725759 - 2²⁰ = 8504677183 is a prime.

It is a super-2 number, since 2×8505725759² (a number of 21 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 8505725759.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8505725959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23758832 + ... + 23759189.

It is an arithmetic number, because the mean of its divisors is an integer number (2138310990).

Almost surely, 2^8505725759 is an apocalyptic number.

8505725759 is a deficient number, since it is larger than the sum of its proper divisors (47518201).

8505725759 is a wasteful number, since it uses less digits than its factorization.

8505725759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47518200.

The product of its (nonzero) digits is 4410000, while the sum is 53.

The square root of 8505725759 is about 92226.4916333696. The cubic root of 8505725759 is about 2041.2856946406.

The spelling of 8505725759 in words is "eight billion, five hundred five million, seven hundred twenty-five thousand, seven hundred fifty-nine".