445266721841 has 2 divisors, whose sum is σ = 445266721842. Its totient is φ = 445266721840.

The previous prime is 445266721813. The next prime is 445266721937. The reversal of 445266721841 is 148127662544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 445129152400 + 137569441 = 667180^2 + 11729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445266721841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 445266721841.

It is not a weakly prime, because it can be changed into another prime (445266729841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222633360920 + 222633360921.

It is an arithmetic number, because the mean of its divisors is an integer number (222633360921).

Almost surely, 2^445266721841 is an apocalyptic number.

It is an amenable number.

445266721841 is a deficient number, since it is larger than the sum of its proper divisors (1).

445266721841 is an equidigital number, since it uses as much as digits as its factorization.

445266721841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2580480, while the sum is 50.

The spelling of 445266721841 in words is "four hundred forty-five billion, two hundred sixty-six million, seven hundred twenty-one thousand, eight hundred forty-one".