6456216730209 has 4 divisors (see below), whose sum is σ = 8608288973616. Its totient is φ = 4304144486804.

The previous prime is 6456216730081. The next prime is 6456216730319. The reversal of 6456216730209 is 9020376126546.

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 not a de Polignac number, because 6456216730209 - 2⁷ = 6456216730081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6456216730009) 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, 1076036121699 + ... + 1076036121704.

It is an arithmetic number, because the mean of its divisors is an integer number (2152072243404).

Almost surely, 2^{6456216730209} is an apocalyptic number.

It is an amenable number.

6456216730209 is a deficient number, since it is larger than the sum of its proper divisors (2152072243407).

6456216730209 is a wasteful number, since it uses less digits than its factorization.

6456216730209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152072243406.

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 6456216730209 in words is "six trillion, four hundred fifty-six billion, two hundred sixteen million, seven hundred thirty thousand, two hundred nine".