3643765806 has 8 divisors (see below), whose sum is σ = 7287531624. Its totient is φ = 1214588600.

The previous prime is 3643765799. The next prime is 3643765859. The reversal of 3643765806 is 6085673463.

It is a happy number.

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

3643765806 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303647145 + ... + 303647156.

It is an arithmetic number, because the mean of its divisors is an integer number (910941453).

Almost surely, 2^3643765806 is an apocalyptic number.

3643765806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3643765806 is a wasteful number, since it uses less digits than its factorization.

3643765806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607294306.

The product of its (nonzero) digits is 2177280, while the sum is 48.

The square root of 3643765806 is about 60363.6132616330. The cubic root of 3643765806 is about 1538.8046334661.

The spelling of 3643765806 in words is "three billion, six hundred forty-three million, seven hundred sixty-five thousand, eight hundred six".