30720545369 has 2 divisors, whose sum is σ = 30720545370. Its totient is φ = 30720545368.

The previous prime is 30720545353. The next prime is 30720545413. The reversal of 30720545369 is 96354502703.

It is an a-pointer prime, because the next prime (30720545413) can be obtained adding 30720545369 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29253655369 + 1466890000 = 171037^2 + 38300^2 .

It is an emirp because it is prime and its reverse (96354502703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30720545369 - 2⁴ = 30720545353 is a prime.

It is a super-2 number, since 2×30720545369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30720545069) 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, 15360272684 + 15360272685.

It is an arithmetic number, because the mean of its divisors is an integer number (15360272685).

Almost surely, 2^30720545369 is an apocalyptic number.

It is an amenable number.

30720545369 is a deficient number, since it is larger than the sum of its proper divisors (1).

30720545369 is an equidigital number, since it uses as much as digits as its factorization.

30720545369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 44.

The spelling of 30720545369 in words is "thirty billion, seven hundred twenty million, five hundred forty-five thousand, three hundred sixty-nine".