6365640016 has 10 divisors (see below), whose sum is σ = 12333427562. Its totient is φ = 3182820000.

The previous prime is 6365639993. The next prime is 6365640019. The reversal of 6365640016 is 6100465636.

It can be written as a sum of positive squares in only one way, i.e., 4858647616 + 1506992400 = 69704^2 + 38820^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6365640019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198926235 + ... + 198926266.

Almost surely, 2^6365640016 is an apocalyptic number.

It is an amenable number.

6365640016 is a deficient number, since it is larger than the sum of its proper divisors (5967787546).

6365640016 is a wasteful number, since it uses less digits than its factorization.

6365640016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397852509 (or 397852503 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 6365640016 is about 79784.9610891677. The cubic root of 6365640016 is about 1853.3069671157.

The spelling of 6365640016 in words is "six billion, three hundred sixty-five million, six hundred forty thousand, sixteen".