64416644 has 6 divisors (see below), whose sum is σ = 112729134. Its totient is φ = 32208320.

The previous prime is 64416643. The next prime is 64416647. The reversal of 64416644 is 44661446.

It can be written as a sum of positive squares in only one way, i.e., 37063744 + 27352900 = 6088^2 + 5230^2 .

It is not an unprimeable number, because it can be changed into a prime (64416643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8052077 + ... + 8052084.

It is an arithmetic number, because the mean of its divisors is an integer number (18788189).

Almost surely, 2^64416644 is an apocalyptic number.

It is an amenable number.

64416644 is a deficient number, since it is larger than the sum of its proper divisors (48312490).

64416644 is a wasteful number, since it uses less digits than its factorization.

64416644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16104165 (or 16104163 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The square root of 64416644 is about 8025.9980064787. The cubic root of 64416644 is about 400.8661315201.

The spelling of 64416644 in words is "sixty-four million, four hundred sixteen thousand, six hundred forty-four".