6400201009 has 4 divisors (see below), whose sum is σ = 6400410480. Its totient is φ = 6399991540.

The previous prime is 6400200991. The next prime is 6400201097. The reversal of 6400201009 is 9001020046.

6400201009 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9001020046 = 2 ⋅4500510023.

It is a cyclic number.

It is not a de Polignac number, because 6400201009 - 2⁷ = 6400200881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6400201109) 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 3 ways as a sum of consecutive naturals, for example, 49027 + ... + 123304.

It is an arithmetic number, because the mean of its divisors is an integer number (1600102620).

Almost surely, 2^6400201009 is an apocalyptic number.

It is an amenable number.

6400201009 is a deficient number, since it is larger than the sum of its proper divisors (209471).

6400201009 is a wasteful number, since it uses less digits than its factorization.

6400201009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209470.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 6400201009 is about 80001.2562963857. The cubic root of 6400201009 is about 1856.6549707652.

The spelling of 6400201009 in words is "six billion, four hundred million, two hundred one thousand, nine".