3645406868 has 24 divisors (see below), whose sum is σ = 6445383168. Its totient is φ = 1803964896.

The previous prime is 3645406867. The next prime is 3645406927. The reversal of 3645406868 is 8686045463.

It is a happy number.

3645406868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645406867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142505 + ... + 166127.

It is an arithmetic number, because the mean of its divisors is an integer number (268557632).

Almost surely, 2^3645406868 is an apocalyptic number.

It is an amenable number.

3645406868 is a deficient number, since it is larger than the sum of its proper divisors (2799976300).

3645406868 is a wasteful number, since it uses less digits than its factorization.

3645406868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24023 (or 24021 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 50.

The square root of 3645406868 is about 60377.2048707126. The cubic root of 3645406868 is about 1539.0356119768.

The spelling of 3645406868 in words is "three billion, six hundred forty-five million, four hundred six thousand, eight hundred sixty-eight".