6564877516 has 6 divisors (see below), whose sum is σ = 11488535660. Its totient is φ = 3282438756.

The previous prime is 6564877513. The next prime is 6564877559. The reversal of 6564877516 is 6157784656.

It is not an unprimeable number, because it can be changed into a prime (6564877513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820609686 + ... + 820609693.

Almost surely, 2^6564877516 is an apocalyptic number.

It is an amenable number.

6564877516 is a deficient number, since it is larger than the sum of its proper divisors (4923658144).

6564877516 is a wasteful number, since it uses less digits than its factorization.

6564877516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641219383 (or 1641219381 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 55.

The square root of 6564877516 is about 81023.9317485889. The cubic root of 6564877516 is about 1872.4441636514. Note that the first 3 decimals are identical.

The spelling of 6564877516 in words is "six billion, five hundred sixty-four million, eight hundred seventy-seven thousand, five hundred sixteen".