6420195609 has 8 divisors (see below), whose sum is σ = 8560933920. Its totient is φ = 4279793856.

The previous prime is 6420195601. The next prime is 6420195623. The reversal of 6420195609 is 9065910246.

It is a happy number.

6420195609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6420195609 - 2³ = 6420195601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6420195601) 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, 35632 + ... + 118785.

It is an arithmetic number, because the mean of its divisors is an integer number (1070116740).

Almost surely, 2^6420195609 is an apocalyptic number.

It is an amenable number.

6420195609 is a deficient number, since it is larger than the sum of its proper divisors (2140738311).

6420195609 is a wasteful number, since it uses less digits than its factorization.

6420195609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168279.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 6420195609 is about 80126.1231372141. The cubic root of 6420195609 is about 1858.5863935527.

The spelling of 6420195609 in words is "six billion, four hundred twenty million, one hundred ninety-five thousand, six hundred nine".