73226436181 has 2 divisors, whose sum is σ = 73226436182. Its totient is φ = 73226436180.

The previous prime is 73226436169. The next prime is 73226436223. The reversal of 73226436181 is 18163462237.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59906968081 + 13319468100 = 244759^2 + 115410^2 .

It is a cyclic number.

It is not a de Polignac number, because 73226436181 - 2⁵ = 73226436149 is a prime.

It is a super-2 number, since 2×73226436181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73226476181) 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, 36613218090 + 36613218091.

It is an arithmetic number, because the mean of its divisors is an integer number (36613218091).

Almost surely, 2^73226436181 is an apocalyptic number.

It is an amenable number.

73226436181 is a deficient number, since it is larger than the sum of its proper divisors (1).

73226436181 is an equidigital number, since it uses as much as digits as its factorization.

73226436181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 43.

The spelling of 73226436181 in words is "seventy-three billion, two hundred twenty-six million, four hundred thirty-six thousand, one hundred eighty-one".