64555975 has 12 divisors (see below), whose sum is σ = 87327000. Its totient is φ = 46949600.

The previous prime is 64555951. The next prime is 64556033. The reversal of 64555975 is 57955546.

It is not a de Polignac number, because 64555975 - 2¹¹ = 64553927 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117100 + ... + 117649.

It is an arithmetic number, because the mean of its divisors is an integer number (7277250).

Almost surely, 2^64555975 is an apocalyptic number.

64555975 is a deficient number, since it is larger than the sum of its proper divisors (22771025).

64555975 is a wasteful number, since it uses less digits than its factorization.

64555975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234770 (or 234765 counting only the distinct ones).

The product of its digits is 945000, while the sum is 46.

The square root of 64555975 is about 8034.6732976519. The cubic root of 64555975 is about 401.1549433054.

The spelling of 64555975 in words is "sixty-four million, five hundred fifty-five thousand, nine hundred seventy-five".