444642171246621 has 6 divisors (see below), whose sum is σ = 642260914022910. Its totient is φ = 296428114164408.

The previous prime is 444642171246619. The next prime is 444642171246631. The reversal of 444642171246621 is 126642171246444.

444642171246621 is a `hidden beast` number, since 4 + 4 + 4 + 6 + 4 + 2 + 1 + 7 + 1 + 2 + 4 + 6 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 435262223717721 + 9379947528900 = 20862939^2 + 3062670^2 .

It is not a de Polignac number, because 444642171246621 - 2¹ = 444642171246619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444642171246631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24702342847026 + ... + 24702342847043.

It is an arithmetic number, because the mean of its divisors is an integer number (107043485670485).

Almost surely, 2^{444642171246621} is an apocalyptic number.

It is an amenable number.

444642171246621 is a deficient number, since it is larger than the sum of its proper divisors (197618742776289).

444642171246621 is a wasteful number, since it uses less digits than its factorization.

444642171246621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49404685694075 (or 49404685694072 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 54.

The spelling of 444642171246621 in words is "four hundred forty-four trillion, six hundred forty-two billion, one hundred seventy-one million, two hundred forty-six thousand, six hundred twenty-one".