444973861861 has 16 divisors (see below), whose sum is σ = 466567371648. Its totient is φ = 424006105600.

The previous prime is 444973861811. The next prime is 444973861873. The reversal of 444973861861 is 168168379444.

It is a cyclic number.

It is not a de Polignac number, because 444973861861 - 2⁷ = 444973861733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 444973861861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444973861811) 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, 402820 + ... + 1025773.

It is an arithmetic number, because the mean of its divisors is an integer number (29160460728).

Almost surely, 2^444973861861 is an apocalyptic number.

444973861861 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

444973861861 is a deficient number, since it is larger than the sum of its proper divisors (21593509787).

444973861861 is a wasteful number, since it uses less digits than its factorization.

444973861861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428812.

The product of its digits is 27869184, while the sum is 61.

The spelling of 444973861861 in words is "four hundred forty-four billion, nine hundred seventy-three million, eight hundred sixty-one thousand, eight hundred sixty-one".