6546864209 has 4 divisors (see below), whose sum is σ = 6552065520. Its totient is φ = 6541662900.

The previous prime is 6546864179. The next prime is 6546864241. The reversal of 6546864209 is 9024686456.

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 6546864209 - 2²⁴ = 6530086993 is a prime.

It is a super-2 number, since 2×6546864209² = 85722861942170391362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6546864809) 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, 2598767 + ... + 2601284.

It is an arithmetic number, because the mean of its divisors is an integer number (1638016380).

Almost surely, 2^6546864209 is an apocalyptic number.

It is an amenable number.

6546864209 is a deficient number, since it is larger than the sum of its proper divisors (5201311).

6546864209 is a wasteful number, since it uses less digits than its factorization.

6546864209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201310.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The square root of 6546864209 is about 80912.6949804541. The cubic root of 6546864209 is about 1870.7300007660.

The spelling of 6546864209 in words is "six billion, five hundred forty-six million, eight hundred sixty-four thousand, two hundred nine".