64636616 has 32 divisors (see below), whose sum is σ = 132602400. Its totient is φ = 29293440.

The previous prime is 64636603. The next prime is 64636631. The reversal of 64636616 is 61663646.

64636616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64636616.

It is an unprimeable number.

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, 35996 + ... + 37748.

It is an arithmetic number, because the mean of its divisors is an integer number (4143825).

Almost surely, 2^64636616 is an apocalyptic number.

It is an amenable number.

64636616 is an abundant number, since it is smaller than the sum of its proper divisors (67965784).

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

64636616 is a wasteful number, since it uses less digits than its factorization.

64636616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2185 counting only the distinct ones).

The product of its digits is 93312, while the sum is 38.

The square root of 64636616 is about 8039.6900437766. The cubic root of 64636616 is about 401.3219099064.

The spelling of 64636616 in words is "sixty-four million, six hundred thirty-six thousand, six hundred sixteen".