6564615245 has 16 divisors (see below), whose sum is σ = 8048160000. Its totient is φ = 5138487744.

The previous prime is 6564615241. The next prime is 6564615251. The reversal of 6564615245 is 5425164656.

It is a cyclic number.

It is not a de Polignac number, because 6564615245 - 2² = 6564615241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6564615196 and 6564615205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6564615241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63506 + ... + 131004.

It is an arithmetic number, because the mean of its divisors is an integer number (503010000).

Almost surely, 2^6564615245 is an apocalyptic number.

It is an amenable number.

6564615245 is a deficient number, since it is larger than the sum of its proper divisors (1483544755).

6564615245 is a wasteful number, since it uses less digits than its factorization.

6564615245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67924.

The product of its digits is 864000, while the sum is 44.

The square root of 6564615245 is about 81022.3132538192. The cubic root of 6564615245 is about 1872.4192282107.

The spelling of 6564615245 in words is "six billion, five hundred sixty-four million, six hundred fifteen thousand, two hundred forty-five".