64256545 has 4 divisors (see below), whose sum is σ = 77107860. Its totient is φ = 51405232.

The previous prime is 64256519. The next prime is 64256561. The reversal of 64256545 is 54565246.

64256545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23001616 + 41254929 = 4796^2 + 6423^2 .

It is a cyclic number.

It is not a de Polignac number, because 64256545 - 2⁵ = 64256513 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6425650 + ... + 6425659.

It is an arithmetic number, because the mean of its divisors is an integer number (19276965).

Almost surely, 2^64256545 is an apocalyptic number.

It is an amenable number.

64256545 is a deficient number, since it is larger than the sum of its proper divisors (12851315).

64256545 is a wasteful number, since it uses less digits than its factorization.

64256545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12851314.

The product of its digits is 144000, while the sum is 37.

The square root of 64256545 is about 8016.0180264268. The cubic root of 64256545 is about 400.5337561940.

The spelling of 64256545 in words is "sixty-four million, two hundred fifty-six thousand, five hundred forty-five".