64768057 has 4 divisors (see below), whose sum is σ = 64785780. Its totient is φ = 64750336.

The previous prime is 64768043. The next prime is 64768061. The reversal of 64768057 is 75086746.

64768057 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 56265001 + 8503056 = 7501^2 + 2916^2 .

It is a cyclic number.

It is not a de Polignac number, because 64768057 - 2¹⁵ = 64735289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64768007) by changing a digit.

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, 1132 + ... + 11437.

It is an arithmetic number, because the mean of its divisors is an integer number (16196445).

Almost surely, 2^64768057 is an apocalyptic number.

It is an amenable number.

64768057 is a deficient number, since it is larger than the sum of its proper divisors (17723).

64768057 is a wasteful number, since it uses less digits than its factorization.

64768057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17722.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 64768057 is about 8047.8603988886. The cubic root of 64768057 is about 401.5937601377.

The spelling of 64768057 in words is "sixty-four million, seven hundred sixty-eight thousand, fifty-seven".