3651664009 has 8 divisors (see below), whose sum is σ = 4173696128. Its totient is φ = 3129723360.

The previous prime is 3651663991. The next prime is 3651664019. The reversal of 3651664009 is 9004661563.

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

It is a cyclic number.

It is not a de Polignac number, because 3651664009 - 2⁷ = 3651663881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3651664019) 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, 140764 + ... + 164674.

It is an arithmetic number, because the mean of its divisors is an integer number (521712016).

Almost surely, 2^3651664009 is an apocalyptic number.

It is an amenable number.

3651664009 is a deficient number, since it is larger than the sum of its proper divisors (522032119).

3651664009 is a wasteful number, since it uses less digits than its factorization.

3651664009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45735.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 3651664009 is about 60428.9997352265. Note that the first 3 decimals coincide. The cubic root of 3651664009 is about 1539.9156653935.

The spelling of 3651664009 in words is "three billion, six hundred fifty-one million, six hundred sixty-four thousand, nine".