64938663 has 24 divisors (see below), whose sum is σ = 96934656. Its totient is φ = 41860800.

The previous prime is 64938661. The next prime is 64938689. The reversal of 64938663 is 36683946.

It is not a de Polignac number, because 64938663 - 2¹ = 64938661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64938661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63093 + ... + 64113.

It is an arithmetic number, because the mean of its divisors is an integer number (4038944).

Almost surely, 2^64938663 is an apocalyptic number.

64938663 is a deficient number, since it is larger than the sum of its proper divisors (31995993).

64938663 is a wasteful number, since it uses less digits than its factorization.

64938663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255 (or 1252 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 64938663 is about 8058.4528912193. The cubic root of 64938663 is about 401.9460646434.

The spelling of 64938663 in words is "sixty-four million, nine hundred thirty-eight thousand, six hundred sixty-three".