64555583 has 2 divisors, whose sum is σ = 64555584. Its totient is φ = 64555582.

The previous prime is 64555541. The next prime is 64555619. The reversal of 64555583 is 38555546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64555583 - 2⁸ = 64555327 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64555583.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64585583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32277791 + 32277792.

It is an arithmetic number, because the mean of its divisors is an integer number (32277792).

Almost surely, 2^64555583 is an apocalyptic number.

64555583 is a deficient number, since it is larger than the sum of its proper divisors (1).

64555583 is an equidigital number, since it uses as much as digits as its factorization.

64555583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360000, while the sum is 41.

The square root of 64555583 is about 8034.6489033436. The cubic root of 64555583 is about 401.1541313327.

The spelling of 64555583 in words is "sixty-four million, five hundred fifty-five thousand, five hundred eighty-three".