64645063 has 12 divisors (see below), whose sum is σ = 75706032. Its totient is φ = 55036800.

The previous prime is 64645043. The next prime is 64645081. The reversal of 64645063 is 36054646.

It is a de Polignac number, because none of the positive numbers 2^k-64645063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64645043) 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 11 ways as a sum of consecutive naturals, for example, 3031 + ... + 11767.

It is an arithmetic number, because the mean of its divisors is an integer number (6308836).

Almost surely, 2^64645063 is an apocalyptic number.

64645063 is a deficient number, since it is larger than the sum of its proper divisors (11060969).

64645063 is a wasteful number, since it uses less digits than its factorization.

64645063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8902 (or 8895 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 64645063 is about 8040.2153578123. The cubic root of 64645063 is about 401.3393913213.

The spelling of 64645063 in words is "sixty-four million, six hundred forty-five thousand, sixty-three".