3686281657 has 16 divisors (see below), whose sum is σ = 3783484432. Its totient is φ = 3590645760.

The previous prime is 3686281639. The next prime is 3686281661. The reversal of 3686281657 is 7561826863.

It can be written as a sum of positive squares in 8 ways, for example, as 584237241 + 3102044416 = 24171^2 + 55696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3686281657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3686231657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2073553 + ... + 2075329.

It is an arithmetic number, because the mean of its divisors is an integer number (236467777).

Almost surely, 2^3686281657 is an apocalyptic number.

It is an amenable number.

3686281657 is a deficient number, since it is larger than the sum of its proper divisors (97202775).

3686281657 is a wasteful number, since it uses less digits than its factorization.

3686281657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188.

The product of its digits is 2903040, while the sum is 52.

The square root of 3686281657 is about 60714.7565011999. The cubic root of 3686281657 is about 1544.7664846785.

The spelling of 3686281657 in words is "three billion, six hundred eighty-six million, two hundred eighty-one thousand, six hundred fifty-seven".