6497201609 has 4 divisors (see below), whose sum is σ = 6497836800. Its totient is φ = 6496566420.

The previous prime is 6497201603. The next prime is 6497201611. The reversal of 6497201609 is 9061027946.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6497201609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6497201609.

It is not an unprimeable number, because it can be changed into a prime (6497201603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301997 + ... + 322794.

It is an arithmetic number, because the mean of its divisors is an integer number (1624459200).

Almost surely, 2^6497201609 is an apocalyptic number.

It is an amenable number.

6497201609 is a deficient number, since it is larger than the sum of its proper divisors (635191).

6497201609 is a wasteful number, since it uses less digits than its factorization.

6497201609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635190.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 6497201609 is about 80605.2207304217. The cubic root of 6497201609 is about 1865.9877187952.

The spelling of 6497201609 in words is "six billion, four hundred ninety-seven million, two hundred one thousand, six hundred nine".