6390650020 has 24 divisors (see below), whose sum is σ = 13476061368. Its totient is φ = 2545651200.

The previous prime is 6390650017. The next prime is 6390650029. The reversal of 6390650020 is 200560936.

It can be written as a sum of positive squares in 4 ways, for example, as 2509609216 + 3881040804 = 50096^2 + 62298^2 .

It is not an unprimeable number, because it can be changed into a prime (6390650029) by changing a digit.

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, 658111 + ... + 667750.

It is an arithmetic number, because the mean of its divisors is an integer number (561502557).

Almost surely, 2^6390650020 is an apocalyptic number.

It is an amenable number.

6390650020 is an abundant number, since it is smaller than the sum of its proper divisors (7085411348).

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

6390650020 is a wasteful number, since it uses less digits than its factorization.

6390650020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326111 (or 1326109 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 6390650020 is about 79941.5412661027. The cubic root of 6390650020 is about 1855.7309518997.

The spelling of 6390650020 in words is "six billion, three hundred ninety million, six hundred fifty thousand, twenty".