64219057 has 12 divisors (see below), whose sum is σ = 74944740. Its totient is φ = 54867456.

The previous prime is 64219039. The next prime is 64219121. The reversal of 64219057 is 75091246.

It can be written as a sum of positive squares in 2 ways, for example, as 31911201 + 32307856 = 5649^2 + 5684^2 .

It is not a de Polignac number, because 64219057 - 2¹¹ = 64217009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64214057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14569 + ... + 18457.

It is an arithmetic number, because the mean of its divisors is an integer number (6245395).

Almost surely, 2^64219057 is an apocalyptic number.

It is an amenable number.

64219057 is a deficient number, since it is larger than the sum of its proper divisors (10725683).

64219057 is a wasteful number, since it uses less digits than its factorization.

64219057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240 (or 4233 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 64219057 is about 8013.6793671821. The cubic root of 64219057 is about 400.4558490568.

The spelling of 64219057 in words is "sixty-four million, two hundred nineteen thousand, fifty-seven".