1722216772013 has 2 divisors, whose sum is σ = 1722216772014. Its totient is φ = 1722216772012.

The previous prime is 1722216772007. The next prime is 1722216772027. The reversal of 1722216772013 is 3102776122271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1638407680009 + 83809092004 = 1280003^2 + 289498^2 .

It is a cyclic number.

It is not a de Polignac number, because 1722216772013 - 2¹⁶ = 1722216706477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1722216777013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861108386006 + 861108386007.

It is an arithmetic number, because the mean of its divisors is an integer number (861108386007).

Almost surely, 2^{1722216772013} is an apocalyptic number.

It is an amenable number.

1722216772013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722216772013 is an equidigital number, since it uses as much as digits as its factorization.

1722216772013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98784, while the sum is 41.

The spelling of 1722216772013 in words is "one trillion, seven hundred twenty-two billion, two hundred sixteen million, seven hundred seventy-two thousand, thirteen".