444643727346445 has 16 divisors (see below), whose sum is σ = 583756522550208. Its totient is φ = 322445333309440.

The previous prime is 444643727346433. The next prime is 444643727346487. The reversal of 444643727346445 is 544643727346444.

It is a happy number.

It is not a de Polignac number, because 444643727346445 - 2²⁷ = 444643593128717 is a prime.

It is a super-2 number, since 2×444643727346445² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11649017524 + ... + 11649055693.

It is an arithmetic number, because the mean of its divisors is an integer number (36484782659388).

Almost surely, 2^{444643727346445} is an apocalyptic number.

It is an amenable number.

444643727346445 is a deficient number, since it is larger than the sum of its proper divisors (139112795203763).

444643727346445 is a wasteful number, since it uses less digits than its factorization.

444643727346445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23298073580.

The product of its digits is 2601123840, while the sum is 67.

Subtracting 444643727346445 from its reverse (544643727346444), we obtain a palindrome (99999999999999).

The spelling of 444643727346445 in words is "four hundred forty-four trillion, six hundred forty-three billion, seven hundred twenty-seven million, three hundred forty-six thousand, four hundred forty-five".