64945808 has 10 divisors (see below), whose sum is σ = 125832534. Its totient is φ = 32472896.

The previous prime is 64945807. The next prime is 64945817. The reversal of 64945808 is 80854946.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59783824 + 5161984 = 7732^2 + 2272^2 .

It is not an unprimeable number, because it can be changed into a prime (64945801) 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 as a sum of consecutive naturals, namely, 2029541 + ... + 2029572.

Almost surely, 2^64945808 is an apocalyptic number.

It is an amenable number.

64945808 is a deficient number, since it is larger than the sum of its proper divisors (60886726).

64945808 is a wasteful number, since it uses less digits than its factorization.

64945808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4059121 (or 4059115 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 64945808 is about 8058.8962023344. The cubic root of 64945808 is about 401.9608057297.

The spelling of 64945808 in words is "sixty-four million, nine hundred forty-five thousand, eight hundred eight".