64685824 has 36 divisors (see below), whose sum is σ = 147568624. Its totient is φ = 27721728.

The previous prime is 64685807. The next prime is 64685837. The reversal of 64685824 is 42858646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16257 + ... + 19840.

Almost surely, 2^64685824 is an apocalyptic number.

64685824 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64685824 is an abundant number, since it is smaller than the sum of its proper divisors (82882800).

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

64685824 is an equidigital number, since it uses as much as digits as its factorization.

64685824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36120 (or 36106 counting only the distinct ones).

The product of its digits is 368640, while the sum is 43.

The square root of 64685824 is about 8042.7497785272. The cubic root of 64685824 is about 401.4237264949.

The spelling of 64685824 in words is "sixty-four million, six hundred eighty-five thousand, eight hundred twenty-four".