1444474317821 has 2 divisors, whose sum is σ = 1444474317822. Its totient is φ = 1444474317820.

The previous prime is 1444474317817. The next prime is 1444474317893. The reversal of 1444474317821 is 1287134744441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1004986200100 + 439488117721 = 1002490^2 + 662939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444474317821 - 2² = 1444474317817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1444474317821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1444474310821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722237158910 + 722237158911.

It is an arithmetic number, because the mean of its divisors is an integer number (722237158911).

Almost surely, 2^{1444474317821} is an apocalyptic number.

It is an amenable number.

1444474317821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444474317821 is an equidigital number, since it uses as much as digits as its factorization.

1444474317821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2408448, while the sum is 50.

The spelling of 1444474317821 in words is "one trillion, four hundred forty-four billion, four hundred seventy-four million, three hundred seventeen thousand, eight hundred twenty-one".