6564713021265 has 64 divisors (see below), whose sum is σ = 12079522824192. Its totient is φ = 2982176870400.

The previous prime is 6564713021263. The next prime is 6564713021267. The reversal of 6564713021265 is 5621203174656.

It is an interprime number because it is at equal distance from previous prime (6564713021263) and next prime (6564713021267).

It is not a de Polignac number, because 6564713021265 - 2¹ = 6564713021263 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6564713021263) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18283620 + ... + 18639210.

It is an arithmetic number, because the mean of its divisors is an integer number (188742544128).

Almost surely, 2^{6564713021265} is an apocalyptic number.

It is an amenable number.

6564713021265 is a deficient number, since it is larger than the sum of its proper divisors (5514809802927).

6564713021265 is a wasteful number, since it uses less digits than its factorization.

6564713021265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356710.

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 6564713021265 in words is "six trillion, five hundred sixty-four billion, seven hundred thirteen million, twenty-one thousand, two hundred sixty-five".