64550816 has 24 divisors (see below), whose sum is σ = 138638304. Its totient is φ = 29341120.

The previous prime is 64550813. The next prime is 64550831. The reversal of 64550816 is 61805546.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64550813) 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, 91340 + ... + 92043.

It is an arithmetic number, because the mean of its divisors is an integer number (5776596).

Almost surely, 2^64550816 is an apocalyptic number.

It is an amenable number.

64550816 is an abundant number, since it is smaller than the sum of its proper divisors (74087488).

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

64550816 is a wasteful number, since it uses less digits than its factorization.

64550816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183404 (or 183396 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 64550816 is about 8034.3522452031. The cubic root of 64550816 is about 401.1442569024.

The spelling of 64550816 in words is "sixty-four million, five hundred fifty thousand, eight hundred sixteen".