3899586645 has 90 divisors (see below), whose sum is σ = 7308022722. Its totient is φ = 1989296064.

The previous prime is 3899586637. The next prime is 3899586659. The reversal of 3899586645 is 5466859983.

3899586645 is a `hidden beast` number, since 3 + 8 + 9 + 9 + 586 + 6 + 45 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 448846596 + 3450740049 = 21186^2 + 58743^2 .

It is not a de Polignac number, because 3899586645 - 2³ = 3899586637 is a prime.

Its product of digits (55987200) is a multiple of the sum of its prime divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 36444682 + ... + 36444788.

Almost surely, 2^3899586645 is an apocalyptic number.

It is an amenable number.

3899586645 is a deficient number, since it is larger than the sum of its proper divisors (3408436077).

3899586645 is an equidigital number, since it uses as much as digits as its factorization.

3899586645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 144 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 63.

The square root of 3899586645 is about 62446.6704076366. The cubic root of 3899586645 is about 1574.0053039017.

The spelling of 3899586645 in words is "three billion, eight hundred ninety-nine million, five hundred eighty-six thousand, six hundred forty-five".