64561255 has 8 divisors (see below), whose sum is σ = 84516624. Its totient is φ = 46953600.

The previous prime is 64561213. The next prime is 64561303. The reversal of 64561255 is 55216546.

64561255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-64561255 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64561255.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 586866 + ... + 586975.

It is an arithmetic number, because the mean of its divisors is an integer number (10564578).

Almost surely, 2^64561255 is an apocalyptic number.

64561255 is a deficient number, since it is larger than the sum of its proper divisors (19955369).

64561255 is a wasteful number, since it uses less digits than its factorization.

64561255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173857.

The product of its digits is 36000, while the sum is 34.

The square root of 64561255 is about 8035.0018668324. The cubic root of 64561255 is about 401.1658797594.

The spelling of 64561255 in words is "sixty-four million, five hundred sixty-one thousand, two hundred fifty-five".