64564061 has 4 divisors (see below), whose sum is σ = 64673532. Its totient is φ = 64454592.

The previous prime is 64564057. The next prime is 64564091. The reversal of 64564061 is 16046546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16046546 = 2 ⋅8023273.

It can be written as a sum of positive squares in 2 ways, for example, as 50268100 + 14295961 = 7090^2 + 3781^2 .

It is a cyclic number.

It is not a de Polignac number, because 64564061 - 2² = 64564057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64564091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53846 + ... + 55031.

It is an arithmetic number, because the mean of its divisors is an integer number (16168383).

Almost surely, 2^64564061 is an apocalyptic number.

It is an amenable number.

64564061 is a deficient number, since it is larger than the sum of its proper divisors (109471).

64564061 is a wasteful number, since it uses less digits than its factorization.

64564061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109470.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 64564061 is about 8035.1764759711. The cubic root of 64564061 is about 401.1716915793.

The spelling of 64564061 in words is "sixty-four million, five hundred sixty-four thousand, sixty-one".