64633868 has 12 divisors (see below), whose sum is σ = 121810080. Its totient is φ = 29830992.

The previous prime is 64633823. The next prime is 64633879. The reversal of 64633868 is 86833646.

64633868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621428 + ... + 621531.

It is an arithmetic number, because the mean of its divisors is an integer number (10150840).

Almost surely, 2^64633868 is an apocalyptic number.

It is an amenable number.

64633868 is a deficient number, since it is larger than the sum of its proper divisors (57176212).

64633868 is a wasteful number, since it uses less digits than its factorization.

64633868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242976 (or 1242974 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The square root of 64633868 is about 8039.5191398491. The cubic root of 64633868 is about 401.3162224787.

The spelling of 64633868 in words is "sixty-four million, six hundred thirty-three thousand, eight hundred sixty-eight".