64939996 has 24 divisors (see below), whose sum is σ = 124225920. Its totient is φ = 29458800.

The previous prime is 64939993. The next prime is 64940021. The reversal of 64939996 is 69993946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64939993) 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 7 ways as a sum of consecutive naturals, for example, 26595 + ... + 28933.

It is an arithmetic number, because the mean of its divisors is an integer number (5176080).

Almost surely, 2^64939996 is an apocalyptic number.

It is an amenable number.

64939996 is a deficient number, since it is larger than the sum of its proper divisors (59285924).

64939996 is a wasteful number, since it uses less digits than its factorization.

64939996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2985 (or 2983 counting only the distinct ones).

The product of its digits is 2834352, while the sum is 55.

The square root of 64939996 is about 8058.5355989783. The cubic root of 64939996 is about 401.9488148819.

The spelling of 64939996 in words is "sixty-four million, nine hundred thirty-nine thousand, nine hundred ninety-six".