3656381839 has 8 divisors (see below), whose sum is σ = 3997400832. Its totient is φ = 3316799640.

The previous prime is 3656381837. The next prime is 3656381849. The reversal of 3656381839 is 9381836563.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3656381839 - 2¹ = 3656381837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656381837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353869 + ... + 364054.

It is an arithmetic number, because the mean of its divisors is an integer number (499675104).

Almost surely, 2^3656381839 is an apocalyptic number.

3656381839 is a deficient number, since it is larger than the sum of its proper divisors (341018993).

3656381839 is a wasteful number, since it uses less digits than its factorization.

3656381839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718397.

The product of its digits is 2799360, while the sum is 52.

The square root of 3656381839 is about 60468.0232767700. The cubic root of 3656381839 is about 1540.5785534914.

The spelling of 3656381839 in words is "three billion, six hundred fifty-six million, three hundred eighty-one thousand, eight hundred thirty-nine".