444687380621 has 16 divisors (see below), whose sum is σ = 515696061888. Its totient is φ = 378965280000.

The previous prime is 444687380611. The next prime is 444687380623. The reversal of 444687380621 is 126083786444.

It is a cyclic number.

It is not a de Polignac number, because 444687380621 - 2³⁴ = 427507511437 is a prime.

It is a super-2 number, since 2×444687380621² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444687380623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4690130 + ... + 4784003.

It is an arithmetic number, because the mean of its divisors is an integer number (32231003868).

Almost surely, 2^444687380621 is an apocalyptic number.

It is an amenable number.

444687380621 is a deficient number, since it is larger than the sum of its proper divisors (71008681267).

444687380621 is a wasteful number, since it uses less digits than its factorization.

444687380621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9474412.

The product of its (nonzero) digits is 6193152, while the sum is 53.

The spelling of 444687380621 in words is "four hundred forty-four billion, six hundred eighty-seven million, three hundred eighty thousand, six hundred twenty-one".