445881391111 has 16 divisors (see below), whose sum is σ = 507196856320. Its totient is φ = 389043012960.

The previous prime is 445881391063. The next prime is 445881391127. The reversal of 445881391111 is 111193188544.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 445881391111 - 2¹⁵ = 445881358343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445881391171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12847851 + ... + 12882508.

It is an arithmetic number, because the mean of its divisors is an integer number (31699803520).

Almost surely, 2^445881391111 is an apocalyptic number.

445881391111 is a deficient number, since it is larger than the sum of its proper divisors (61315465209).

445881391111 is a wasteful number, since it uses less digits than its factorization.

445881391111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25730446.

The product of its digits is 138240, while the sum is 46.

The spelling of 445881391111 in words is "four hundred forty-five billion, eight hundred eighty-one million, three hundred ninety-one thousand, one hundred eleven".