8385170861 has 4 divisors (see below), whose sum is σ = 8387605500. Its totient is φ = 8382736224.

The previous prime is 8385170851. The next prime is 8385170869. The reversal of 8385170861 is 1680715838.

It is a happy number.

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 828345961 + 7556824900 = 28781^2 + 86930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8385170861 is a prime.

It is a super-2 number, since 2×8385170861² (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 (8385170869) 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, 1212146 + ... + 1219043.

It is an arithmetic number, because the mean of its divisors is an integer number (2096901375).

Almost surely, 2^8385170861 is an apocalyptic number.

It is an amenable number.

8385170861 is a deficient number, since it is larger than the sum of its proper divisors (2434639).

8385170861 is a wasteful number, since it uses less digits than its factorization.

8385170861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434638.

The product of its (nonzero) digits is 322560, while the sum is 47.

The square root of 8385170861 is about 91570.5785774012. The cubic root of 8385170861 is about 2031.5957960926.

The spelling of 8385170861 in words is "eight billion, three hundred eighty-five million, one hundred seventy thousand, eight hundred sixty-one".