444549138406 has 32 divisors (see below), whose sum is σ = 743358504960. Its totient is φ = 198149245056.

The previous prime is 444549138391. The next prime is 444549138469. The reversal of 444549138406 is 604831945444.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 3271291 + ... + 3404473.

It is an arithmetic number, because the mean of its divisors is an integer number (23229953280).

Almost surely, 2^444549138406 is an apocalyptic number.

444549138406 is a deficient number, since it is larger than the sum of its proper divisors (298809366554).

444549138406 is a wasteful number, since it uses less digits than its factorization.

444549138406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138388.

The product of its (nonzero) digits is 6635520, while the sum is 52.

The spelling of 444549138406 in words is "four hundred forty-four billion, five hundred forty-nine million, one hundred thirty-eight thousand, four hundred six".