64523636 has 12 divisors (see below), whose sum is σ = 119558628. Its totient is φ = 30364032.

The previous prime is 64523633. The next prime is 64523647. The reversal of 64523636 is 63632546.

It can be written as a sum of positive squares in 2 ways, for example, as 34339600 + 30184036 = 5860^2 + 5494^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64523596 and 64523605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64523633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474371 + ... + 474506.

It is an arithmetic number, because the mean of its divisors is an integer number (9963219).

Almost surely, 2^64523636 is an apocalyptic number.

It is an amenable number.

64523636 is a deficient number, since it is larger than the sum of its proper divisors (55034992).

64523636 is a wasteful number, since it uses less digits than its factorization.

64523636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948898 (or 948896 counting only the distinct ones).

The product of its digits is 77760, while the sum is 35.

The square root of 64523636 is about 8032.6605804055. The cubic root of 64523636 is about 401.0879465812.

The spelling of 64523636 in words is "sixty-four million, five hundred twenty-three thousand, six hundred thirty-six".