64444618 has 16 divisors (see below), whose sum is σ = 116291520. Its totient is φ = 26165376.

The previous prime is 64444607. The next prime is 64444621. The reversal of 64444618 is 81644446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120871 + ... + 121402.

It is an arithmetic number, because the mean of its divisors is an integer number (7268220).

Almost surely, 2^64444618 is an apocalyptic number.

64444618 is a deficient number, since it is larger than the sum of its proper divisors (51846902).

64444618 is a wasteful number, since it uses less digits than its factorization.

64444618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242301.

The product of its digits is 73728, while the sum is 37.

The square root of 64444618 is about 8027.7405289409. The cubic root of 64444618 is about 400.9241507193.

The spelling of 64444618 in words is "sixty-four million, four hundred forty-four thousand, six hundred eighteen".