64817808 has 40 divisors (see below), whose sum is σ = 182669856. Its totient is φ = 19641600.

The previous prime is 64817803. The next prime is 64817827. The reversal of 64817808 is 80871846.

It is a self number, because there is not a number n which added to its sum of digits gives 64817808.

It is not an unprimeable number, because it can be changed into a prime (64817803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60853 + ... + 61908.

Almost surely, 2^64817808 is an apocalyptic number.

It is an amenable number.

64817808 is an abundant number, since it is smaller than the sum of its proper divisors (117852048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64817808 is a wasteful number, since it uses less digits than its factorization.

64817808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122783 (or 122777 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 64817808 is about 8050.9507513088. The cubic root of 64817808 is about 401.6965606977.

The spelling of 64817808 in words is "sixty-four million, eight hundred seventeen thousand, eight hundred eight".