2730822905621 has 2 divisors, whose sum is σ = 2730822905622. Its totient is φ = 2730822905620.

The previous prime is 2730822905557. The next prime is 2730822905641. The reversal of 2730822905621 is 1265092280372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1875697332721 + 855125572900 = 1369561^2 + 924730^2 .

It is a cyclic number.

It is not a de Polignac number, because 2730822905621 - 2⁶ = 2730822905557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2730822905641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365411452810 + 1365411452811.

It is an arithmetic number, because the mean of its divisors is an integer number (1365411452811).

Almost surely, 2^{2730822905621} is an apocalyptic number.

It is an amenable number.

2730822905621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2730822905621 is an equidigital number, since it uses as much as digits as its factorization.

2730822905621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 2730822905621 in words is "two trillion, seven hundred thirty billion, eight hundred twenty-two million, nine hundred five thousand, six hundred twenty-one".