853861617 has 24 divisors (see below), whose sum is σ = 1447649216. Its totient is φ = 474732576.

The previous prime is 853861597. The next prime is 853861667. The reversal of 853861617 is 716168358.

It is not a de Polignac number, because 853861617 - 2⁶ = 853861553 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (853861667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180823 + ... + 185484.

Almost surely, 2^853861617 is an apocalyptic number.

It is an amenable number.

853861617 is a deficient number, since it is larger than the sum of its proper divisors (593787599).

853861617 is a wasteful number, since it uses less digits than its factorization.

853861617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366357 (or 366354 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 853861617 is about 29220.9106120942. The cubic root of 853861617 is about 948.7005750524.

The spelling of 853861617 in words is "eight hundred fifty-three million, eight hundred sixty-one thousand, six hundred seventeen".