445685722138 has 16 divisors (see below), whose sum is σ = 676169282880. Its totient is φ = 220303334016.

The previous prime is 445685722123. The next prime is 445685722171. The reversal of 445685722138 is 831227586544.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1721943 + ... + 1963786.

It is an arithmetic number, because the mean of its divisors is an integer number (42260580180).

Almost surely, 2^445685722138 is an apocalyptic number.

445685722138 is a deficient number, since it is larger than the sum of its proper divisors (230483560742).

445685722138 is a wasteful number, since it uses less digits than its factorization.

445685722138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686421.

The product of its digits is 12902400, while the sum is 55.

The spelling of 445685722138 in words is "four hundred forty-five billion, six hundred eighty-five million, seven hundred twenty-two thousand, one hundred thirty-eight".