6365641220 has 48 divisors (see below), whose sum is σ = 13486368000. Its totient is φ = 2523744000.

The previous prime is 6365641213. The next prime is 6365641229. The reversal of 6365641220 is 221465636.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6365641229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2086256 + ... + 2089304.

It is an arithmetic number, because the mean of its divisors is an integer number (280966000).

Almost surely, 2^6365641220 is an apocalyptic number.

It is an amenable number.

6365641220 is an abundant number, since it is smaller than the sum of its proper divisors (7120726780).

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

6365641220 is a wasteful number, since it uses less digits than its factorization.

6365641220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948 (or 3946 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 6365641220 is about 79784.9686344489. The cubic root of 6365641220 is about 1853.3070839608.

The spelling of 6365641220 in words is "six billion, three hundred sixty-five million, six hundred forty-one thousand, two hundred twenty".