1445836492721 has 2 divisors, whose sum is σ = 1445836492722. Its totient is φ = 1445836492720.

The previous prime is 1445836492717. The next prime is 1445836492801. The reversal of 1445836492721 is 1272946385441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1407222277696 + 38614215025 = 1186264^2 + 196505^2 .

It is an emirp because it is prime and its reverse (1272946385441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1445836492721 - 2² = 1445836492717 is a prime.

It is not a weakly prime, because it can be changed into another prime (1445836492421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722918246360 + 722918246361.

It is an arithmetic number, because the mean of its divisors is an integer number (722918246361).

Almost surely, 2^{1445836492721} is an apocalyptic number.

It is an amenable number.

1445836492721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445836492721 is an equidigital number, since it uses as much as digits as its factorization.

1445836492721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 56.

The spelling of 1445836492721 in words is "one trillion, four hundred forty-five billion, eight hundred thirty-six million, four hundred ninety-two thousand, seven hundred twenty-one".