444681181258138 has 24 divisors (see below), whose sum is σ = 752988169574676. Its totient is φ = 196664895884160.

The previous prime is 444681181258091. The next prime is 444681181258169. The reversal of 444681181258138 is 831852181186444.

It can be written as a sum of positive squares in 2 ways, for example, as 443112056751529 + 1569124506609 = 21050227^2 + 1252647^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 444681181258138.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24831417295 + ... + 24831435202.

Almost surely, 2^{444681181258138} is an apocalyptic number.

444681181258138 is a deficient number, since it is larger than the sum of its proper divisors (308306988316538).

444681181258138 is a wasteful number, since it uses less digits than its factorization.

444681181258138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49662852558 (or 49662852547 counting only the distinct ones).

The product of its digits is 47185920, while the sum is 64.

The spelling of 444681181258138 in words is "four hundred forty-four trillion, six hundred eighty-one billion, one hundred eighty-one million, two hundred fifty-eight thousand, one hundred thirty-eight".