6545776568 has 8 divisors (see below), whose sum is σ = 12273331080. Its totient is φ = 3272888280.

The previous prime is 6545776561. The next prime is 6545776571. The reversal of 6545776568 is 8656775456.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6545776561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409111028 + ... + 409111043.

It is an arithmetic number, because the mean of its divisors is an integer number (1534166385).

Almost surely, 2^6545776568 is an apocalyptic number.

It is an amenable number.

6545776568 is a deficient number, since it is larger than the sum of its proper divisors (5727554512).

6545776568 is a wasteful number, since it uses less digits than its factorization.

6545776568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818222077 (or 818222073 counting only the distinct ones).

The product of its digits is 42336000, while the sum is 59.

The square root of 6545776568 is about 80905.9736237072. The cubic root of 6545776568 is about 1870.6263992417.

The spelling of 6545776568 in words is "six billion, five hundred forty-five million, seven hundred seventy-six thousand, five hundred sixty-eight".