6564527280 has 160 divisors (see below), whose sum is σ = 22642598400. Its totient is φ = 1748107008.

The previous prime is 6564527279. The next prime is 6564527317. The reversal of 6564527280 is 827254656.

6564527280 is a `hidden beast` number, since 6 + 56 + 452 + 72 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1983387 + ... + 1986693.

It is an arithmetic number, because the mean of its divisors is an integer number (141516240).

Almost surely, 2^6564527280 is an apocalyptic number.

6564527280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6564527280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11321299200).

6564527280 is an abundant number, since it is smaller than the sum of its proper divisors (16078071120).

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

6564527280 is a wasteful number, since it uses less digits than its factorization.

6564527280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248 (or 4236 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 6564527280 is about 81021.7704077120. The cubic root of 6564527280 is about 1872.4108647810.

The spelling of 6564527280 in words is "six billion, five hundred sixty-four million, five hundred twenty-seven thousand, two hundred eighty".