64649236 has 12 divisors (see below), whose sum is σ = 117037620. Its totient is φ = 31209920.

The previous prime is 64649231. The next prime is 64649237. The reversal of 64649236 is 63294646.

64649236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47059600 + 17589636 = 6860^2 + 4194^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64649231) 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 3 ways as a sum of consecutive naturals, for example, 278545 + ... + 278776.

It is an arithmetic number, because the mean of its divisors is an integer number (9753135).

Almost surely, 2^64649236 is an apocalyptic number.

It is an amenable number.

64649236 is a deficient number, since it is larger than the sum of its proper divisors (52388384).

64649236 is a wasteful number, since it uses less digits than its factorization.

64649236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557354 (or 557352 counting only the distinct ones).

The product of its digits is 186624, while the sum is 40.

The square root of 64649236 is about 8040.4748615987. The cubic root of 64649236 is about 401.3480269550.

The spelling of 64649236 in words is "sixty-four million, six hundred forty-nine thousand, two hundred thirty-six".