8164715285 has 4 divisors (see below), whose sum is σ = 9797658348. Its totient is φ = 6531772224.

The previous prime is 8164715267. The next prime is 8164715287. The reversal of 8164715285 is 5825174618.

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 4544647396 + 3620067889 = 67414^2 + 60167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8164715285 is a prime.

It is a super-2 number, since 2×8164715285² (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 (8164715287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816471524 + ... + 816471533.

It is an arithmetic number, because the mean of its divisors is an integer number (2449414587).

Almost surely, 2^8164715285 is an apocalyptic number.

It is an amenable number.

8164715285 is a deficient number, since it is larger than the sum of its proper divisors (1632943063).

8164715285 is a wasteful number, since it uses less digits than its factorization.

8164715285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632943062.

The product of its digits is 537600, while the sum is 47.

The square root of 8164715285 is about 90358.8140969103. The cubic root of 8164715285 is about 2013.6331314563.

The spelling of 8164715285 in words is "eight billion, one hundred sixty-four million, seven hundred fifteen thousand, two hundred eighty-five".