3646635216 has 40 divisors (see below), whose sum is σ = 10766257344. Its totient is φ = 1041895680.

The previous prime is 3646635191. The next prime is 3646635229. The reversal of 3646635216 is 6125366463.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5426205 + ... + 5426876.

Almost surely, 2^3646635216 is an apocalyptic number.

It is an amenable number.

3646635216 is an abundant number, since it is smaller than the sum of its proper divisors (7119622128).

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

3646635216 is a wasteful number, since it uses less digits than its factorization.

3646635216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10853099 (or 10853093 counting only the distinct ones).

The product of its digits is 466560, while the sum is 42.

The square root of 3646635216 is about 60387.3762967063. The cubic root of 3646635216 is about 1539.2084558767.

The spelling of 3646635216 in words is "three billion, six hundred forty-six million, six hundred thirty-five thousand, two hundred sixteen".