6564165415 has 4 divisors (see below), whose sum is σ = 7876998504. Its totient is φ = 5251332328.

The previous prime is 6564165403. The next prime is 6564165481. The reversal of 6564165415 is 5145614656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6564165415 - 2¹⁷ = 6564034343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656416537 + ... + 656416546.

It is an arithmetic number, because the mean of its divisors is an integer number (1969249626).

Almost surely, 2^6564165415 is an apocalyptic number.

6564165415 is a deficient number, since it is larger than the sum of its proper divisors (1312833089).

6564165415 is a wasteful number, since it uses less digits than its factorization.

6564165415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312833088.

The product of its digits is 432000, while the sum is 43.

The square root of 6564165415 is about 81019.5372425688. The cubic root of 6564165415 is about 1872.3764590333.

The spelling of 6564165415 in words is "six billion, five hundred sixty-four million, one hundred sixty-five thousand, four hundred fifteen".