80743155221 has 2 divisors, whose sum is σ = 80743155222. Its totient is φ = 80743155220.

The previous prime is 80743155191. The next prime is 80743155223. The reversal of 80743155221 is 12255134708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79023394321 + 1719760900 = 281111^2 + 41470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80743155221 is a prime.

Together with 80743155223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80743155223) 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, 40371577610 + 40371577611.

It is an arithmetic number, because the mean of its divisors is an integer number (40371577611).

Almost surely, 2^80743155221 is an apocalyptic number.

It is an amenable number.

80743155221 is a deficient number, since it is larger than the sum of its proper divisors (1).

80743155221 is an equidigital number, since it uses as much as digits as its factorization.

80743155221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 38.

Adding to 80743155221 its reverse (12255134708), we get a palindrome (92998289929).

The spelling of 80743155221 in words is "eighty billion, seven hundred forty-three million, one hundred fifty-five thousand, two hundred twenty-one".