8285644069 has 4 divisors (see below), whose sum is σ = 8293824396. Its totient is φ = 8277463744.

The previous prime is 8285644063. The next prime is 8285644111. The reversal of 8285644069 is 9604465828.

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 459587844 + 7826056225 = 21438^2 + 88465^2 .

It is a cyclic number.

It is not a de Polignac number, because 8285644069 - 2⁷ = 8285643941 is a prime.

It is a super-2 number, since 2×8285644069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8285644063) 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, 4088644 + ... + 4090669.

It is an arithmetic number, because the mean of its divisors is an integer number (2073456099).

Almost surely, 2^8285644069 is an apocalyptic number.

It is an amenable number.

8285644069 is a deficient number, since it is larger than the sum of its proper divisors (8180327).

8285644069 is a wasteful number, since it uses less digits than its factorization.

8285644069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8180326.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The square root of 8285644069 is about 91025.5132861112. The cubic root of 8285644069 is about 2023.5258544401.

The spelling of 8285644069 in words is "eight billion, two hundred eighty-five million, six hundred forty-four thousand, sixty-nine".