64568545 has 4 divisors (see below), whose sum is σ = 77482260. Its totient is φ = 51654832.

The previous prime is 64568531. The next prime is 64568557. The reversal of 64568545 is 54586546.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31494544 + 33074001 = 5612^2 + 5751^2 .

It is a cyclic number.

It is not a de Polignac number, because 64568545 - 2⁵ = 64568513 is a prime.

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, 6456850 + ... + 6456859.

It is an arithmetic number, because the mean of its divisors is an integer number (19370565).

Almost surely, 2^64568545 is an apocalyptic number.

It is an amenable number.

64568545 is a deficient number, since it is larger than the sum of its proper divisors (12913715).

64568545 is a wasteful number, since it uses less digits than its factorization.

64568545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12913714.

The product of its digits is 576000, while the sum is 43.

The square root of 64568545 is about 8035.4554942455. The cubic root of 64568545 is about 401.1809785427.

The spelling of 64568545 in words is "sixty-four million, five hundred sixty-eight thousand, five hundred forty-five".