64685536 has 48 divisors (see below), whose sum is σ = 133358400. Its totient is φ = 30853120.

The previous prime is 64685521. The next prime is 64685539. The reversal of 64685536 is 63558646.

64685536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 64685492 and 64685501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64685539) 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 7 ways as a sum of consecutive naturals, for example, 61140 + ... + 62188.

It is an arithmetic number, because the mean of its divisors is an integer number (2778300).

Almost surely, 2^64685536 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 64685536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66679200).

64685536 is an abundant number, since it is smaller than the sum of its proper divisors (68672864).

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

64685536 is a wasteful number, since it uses less digits than its factorization.

64685536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1139 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The square root of 64685536 is about 8042.7318741831. The cubic root of 64685536 is about 401.4231307425.

The spelling of 64685536 in words is "sixty-four million, six hundred eighty-five thousand, five hundred thirty-six".