64675563 has 16 divisors (see below), whose sum is σ = 94721280. Its totient is φ = 39070944.

The previous prime is 64675561. The next prime is 64675603. The reversal of 64675563 is 36557646.

It is not a de Polignac number, because 64675563 - 2¹ = 64675561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64675561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23356 + ... + 25977.

It is an arithmetic number, because the mean of its divisors is an integer number (5920080).

Almost surely, 2^64675563 is an apocalyptic number.

64675563 is a deficient number, since it is larger than the sum of its proper divisors (30045717).

64675563 is a wasteful number, since it uses less digits than its factorization.

64675563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49378.

The product of its digits is 453600, while the sum is 42.

The square root of 64675563 is about 8042.1118495082. Note that the first 3 decimals coincide. The cubic root of 64675563 is about 401.4024996561.

The spelling of 64675563 in words is "sixty-four million, six hundred seventy-five thousand, five hundred sixty-three".