64045645 has 4 divisors (see below), whose sum is σ = 76854780. Its totient is φ = 51236512.

The previous prime is 64045609. The next prime is 64045651. The reversal of 64045645 is 54654046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54654046 = 2 ⋅27327023.

It can be written as a sum of positive squares in 2 ways, for example, as 25431849 + 38613796 = 5043^2 + 6214^2 .

It is a cyclic number.

It is not a de Polignac number, because 64045645 - 2⁷ = 64045517 is a prime.

It is a super-3 number, since 3×64045645³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64045645.

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, 6404560 + ... + 6404569.

It is an arithmetic number, because the mean of its divisors is an integer number (19213695).

Almost surely, 2^64045645 is an apocalyptic number.

It is an amenable number.

64045645 is a deficient number, since it is larger than the sum of its proper divisors (12809135).

64045645 is a wasteful number, since it uses less digits than its factorization.

64045645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12809134.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 64045645 is about 8002.8523040226. The cubic root of 64045645 is about 400.0950711519.

The spelling of 64045645 in words is "sixty-four million, forty-five thousand, six hundred forty-five".