445121618 has 16 divisors (see below), whose sum is σ = 686517120. Its totient is φ = 216296496.

The previous prime is 445121539. The next prime is 445121623. The reversal of 445121618 is 816121544.

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, 72455 + ... + 78357.

It is an arithmetic number, because the mean of its divisors is an integer number (42907320).

Almost surely, 2^445121618 is an apocalyptic number.

445121618 is a deficient number, since it is larger than the sum of its proper divisors (241395502).

445121618 is a wasteful number, since it uses less digits than its factorization.

445121618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6961.

The product of its digits is 7680, while the sum is 32.

The square root of 445121618 is about 21097.9055358583. The cubic root of 445121618 is about 763.5302167954.

The spelling of 445121618 in words is "four hundred forty-five million, one hundred twenty-one thousand, six hundred eighteen".