64555317 has 12 divisors (see below), whose sum is σ = 93342444. Its totient is φ = 42992640.

The previous prime is 64555313. The next prime is 64555321. The reversal of 64555317 is 71355546.

64555317 is a `hidden beast` number, since 645 + 5 + 5 + 3 + 1 + 7 = 666.

64555317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64555313) and next prime (64555321).

It can be written as a sum of positive squares in 2 ways, for example, as 23415921 + 41139396 = 4839^2 + 6414^2 .

It is not a de Polignac number, because 64555317 - 2² = 64555313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64555313) 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 11 ways as a sum of consecutive naturals, for example, 7267 + ... + 13487.

It is an arithmetic number, because the mean of its divisors is an integer number (7778537).

Almost surely, 2^64555317 is an apocalyptic number.

It is an amenable number.

64555317 is a deficient number, since it is larger than the sum of its proper divisors (28787127).

64555317 is a wasteful number, since it uses less digits than its factorization.

64555317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7380 (or 7377 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 64555317 is about 8034.6323500208. The cubic root of 64555317 is about 401.1535803494.

The spelling of 64555317 in words is "sixty-four million, five hundred fifty-five thousand, three hundred seventeen".