6564520634 has 16 divisors (see below), whose sum is σ = 11845752000. Its totient is φ = 2665293984.

The previous prime is 6564520631. The next prime is 6564520637. The reversal of 6564520634 is 4360254656.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6564520631) and next prime (6564520637).

It is a junction number, because it is equal to n+sod(n) for n = 6564520591 and 6564520600.

It is not an unprimeable number, because it can be changed into a prime (6564520631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12339059 + ... + 12339590.

It is an arithmetic number, because the mean of its divisors is an integer number (740359500).

Almost surely, 2^6564520634 is an apocalyptic number.

6564520634 is a deficient number, since it is larger than the sum of its proper divisors (5281231366).

6564520634 is a wasteful number, since it uses less digits than its factorization.

6564520634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24678677.

The product of its (nonzero) digits is 518400, while the sum is 41.

The square root of 6564520634 is about 81021.7293940335. The cubic root of 6564520634 is about 1872.4102328977.

The spelling of 6564520634 in words is "six billion, five hundred sixty-four million, five hundred twenty thousand, six hundred thirty-four".