64315647 has 16 divisors (see below), whose sum is σ = 103944960. Its totient is φ = 38979000.

The previous prime is 64315637. The next prime is 64315651. The reversal of 64315647 is 74651346.

It is a happy number.

64315647 is a `hidden beast` number, since 6 + 4 + 3 + 1 + 5 + 647 = 666.

It is not a de Polignac number, because 64315647 - 2⁴ = 64315631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64315637) 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 15 ways as a sum of consecutive naturals, for example, 107979 + ... + 108572.

It is an arithmetic number, because the mean of its divisors is an integer number (6496560).

Almost surely, 2^64315647 is an apocalyptic number.

64315647 is a deficient number, since it is larger than the sum of its proper divisors (39629313).

64315647 is a wasteful number, since it uses less digits than its factorization.

64315647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216571 (or 216565 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 64315647 is about 8019.7036728298. The cubic root of 64315647 is about 400.6565197816.

It can be divided in two parts, 643 and 15647, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 64315647 in words is "sixty-four million, three hundred fifteen thousand, six hundred forty-seven".