3638945937 has 16 divisors (see below), whose sum is σ = 5352488640. Its totient is φ = 2180640000.

The previous prime is 3638945929. The next prime is 3638945941. The reversal of 3638945937 is 7395498363.

It is a happy number.

3638945937 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 3638945937 - 2³ = 3638945929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3638941937) 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, 616564 + ... + 622437.

It is an arithmetic number, because the mean of its divisors is an integer number (334530540).

Almost surely, 2^3638945937 is an apocalyptic number.

It is an amenable number.

3638945937 is a deficient number, since it is larger than the sum of its proper divisors (1713542703).

3638945937 is a wasteful number, since it uses less digits than its factorization.

3638945937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239104.

The product of its digits is 14696640, while the sum is 57.

The square root of 3638945937 is about 60323.6764214516. The cubic root of 3638945937 is about 1538.1258385225.

The spelling of 3638945937 in words is "three billion, six hundred thirty-eight million, nine hundred forty-five thousand, nine hundred thirty-seven".