6564611216 has 40 divisors (see below), whose sum is σ = 13258080000. Its totient is φ = 3144901760.

The previous prime is 6564611203. The next prime is 6564611227. The reversal of 6564611216 is 6121164656.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6564611216.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6785 + ... + 114783.

It is an arithmetic number, because the mean of its divisors is an integer number (331452000).

Almost surely, 2^6564611216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6564611216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6629040000).

6564611216 is an abundant number, since it is smaller than the sum of its proper divisors (6693468784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6564611216 is a wasteful number, since it uses less digits than its factorization.

6564611216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108167 (or 108161 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 6564611216 is about 81022.2883902942. The cubic root of 6564611216 is about 1872.4188451479.

The spelling of 6564611216 in words is "six billion, five hundred sixty-four million, six hundred eleven thousand, two hundred sixteen".