6477216569 has 4 divisors (see below), whose sum is σ = 6477758544. Its totient is φ = 6476674596.

The previous prime is 6477216541. The next prime is 6477216607. The reversal of 6477216569 is 9656127746.

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 6477216569 - 2⁸ = 6477216313 is a prime.

It is a super-2 number, since 2×6477216569² = 83908668963456263522, which contains 22 as substring.

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 6477216569.

It is not an unprimeable number, because it can be changed into a prime (6477216509) 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, 252647 + ... + 277100.

It is an arithmetic number, because the mean of its divisors is an integer number (1619439636).

Almost surely, 2^6477216569 is an apocalyptic number.

It is an amenable number.

6477216569 is a deficient number, since it is larger than the sum of its proper divisors (541975).

6477216569 is a wasteful number, since it uses less digits than its factorization.

6477216569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541974.

The product of its digits is 3810240, while the sum is 53.

The square root of 6477216569 is about 80481.1566082397. The cubic root of 6477216569 is about 1864.0725280812.

The spelling of 6477216569 in words is "six billion, four hundred seventy-seven million, two hundred sixteen thousand, five hundred sixty-nine".