444354421655 has 4 divisors (see below), whose sum is σ = 533225305992. Its totient is φ = 355483537320.

The previous prime is 444354421633. The next prime is 444354421669. The reversal of 444354421655 is 556124453444.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-444354421655 is a prime.

It is a super-3 number, since 3×444354421655³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 44435442161 + ... + 44435442170.

It is an arithmetic number, because the mean of its divisors is an integer number (133306326498).

Almost surely, 2^444354421655 is an apocalyptic number.

444354421655 is a deficient number, since it is larger than the sum of its proper divisors (88870884337).

444354421655 is an equidigital number, since it uses as much as digits as its factorization.

444354421655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88870884336.

The product of its digits is 4608000, while the sum is 47.

The spelling of 444354421655 in words is "four hundred forty-four billion, three hundred fifty-four million, four hundred twenty-one thousand, six hundred fifty-five".