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444444938681 = 769957727619
BaseRepresentation
bin1100111011110101111…
…10111001000110111001
31120111012010120012001212
412131322332321012321
524240210401014211
6540101501252505
744052521434502
oct6357276710671
91514163505055
10444444938681
11161540643687
1272177864135
1332bac559323
1417722c25ba9
15b86374438b
hex677afb91b9

444444938681 has 4 divisors (see below), whose sum is σ = 444502674000. Its totient is φ = 444387203364.

The previous prime is 444444938671. The next prime is 444444938683. The reversal of 444444938681 is 186839444444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-444444938681 is a prime.

It is a super-2 number, since 2×4444449386812 (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 444444938681.

It is not an unprimeable number, because it can be changed into a prime (444444938683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28856111 + ... + 28871508.

It is an arithmetic number, because the mean of its divisors is an integer number (111125668500).

Almost surely, 2444444938681 is an apocalyptic number.

It is an amenable number.

444444938681 is a deficient number, since it is larger than the sum of its proper divisors (57735319).

444444938681 is an equidigital number, since it uses as much as digits as its factorization.

444444938681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57735318.

The product of its digits is 42467328, while the sum is 59.

The spelling of 444444938681 in words is "four hundred forty-four billion, four hundred forty-four million, nine hundred thirty-eight thousand, six hundred eighty-one".

Divisors: 1 7699 57727619 444444938681