64505808 has 120 divisors (see below), whose sum is σ = 191737728. Its totient is φ = 20984832.

The previous prime is 64505807. The next prime is 64505809. The reversal of 64505808 is 80850546.

It is a happy number.

64505808 is a `hidden beast` number, since 645 + 0 + 5 + 8 + 0 + 8 = 666.

64505808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64505807) and next prime (64505809).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64505801) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 182560 + ... + 182912.

Almost surely, 2^64505808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64505808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95868864).

64505808 is an abundant number, since it is smaller than the sum of its proper divisors (127231920).

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

64505808 is a wasteful number, since it uses less digits than its factorization.

64505808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 64505808 is about 8031.5507842508. The cubic root of 64505808 is about 401.0510027312.

The spelling of 64505808 in words is "sixty-four million, five hundred five thousand, eight hundred eight".