3639689845 has 16 divisors (see below), whose sum is σ = 4829959872. Its totient is φ = 2610783360.

The previous prime is 3639689839. The next prime is 3639689857. The reversal of 3639689845 is 5489869363.

3639689845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3639689845 - 2⁵ = 3639689813 is a prime.

It is a super-2 number, since 2×3639689845² = 26494684335592248050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449247 + ... + 457276.

It is an arithmetic number, because the mean of its divisors is an integer number (301872492).

Almost surely, 2^3639689845 is an apocalyptic number.

It is an amenable number.

3639689845 is a deficient number, since it is larger than the sum of its proper divisors (1190270027).

3639689845 is a wasteful number, since it uses less digits than its factorization.

3639689845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906612.

The product of its digits is 33592320, while the sum is 61.

The square root of 3639689845 is about 60329.8420767036. The cubic root of 3639689845 is about 1538.2306441607.

The spelling of 3639689845 in words is "three billion, six hundred thirty-nine million, six hundred eighty-nine thousand, eight hundred forty-five".