445641105641421 has 32 divisors (see below), whose sum is σ = 643373876436480. Its totient is φ = 273508018545600.

The previous prime is 445641105641201. The next prime is 445641105641441. The reversal of 445641105641421 is 124146501146544.

It is not a de Polignac number, because 445641105641421 - 2⁹ = 445641105640909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445641105641441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 771809475 + ... + 772386656.

It is an arithmetic number, because the mean of its divisors is an integer number (20105433638640).

Almost surely, 2^{445641105641421} is an apocalyptic number.

It is an amenable number.

445641105641421 is a deficient number, since it is larger than the sum of its proper divisors (197732770795059).

445641105641421 is a wasteful number, since it uses less digits than its factorization.

445641105641421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544196297.

The product of its (nonzero) digits is 1843200, while the sum is 48.

Adding to 445641105641421 its reverse (124146501146544), we get a palindrome (569787606787965).

The spelling of 445641105641421 in words is "four hundred forty-five trillion, six hundred forty-one billion, one hundred five million, six hundred forty-one thousand, four hundred twenty-one".