34181322781 has 2 divisors, whose sum is σ = 34181322782. Its totient is φ = 34181322780.

The previous prime is 34181322767. The next prime is 34181322811. The reversal of 34181322781 is 18722318143.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32484294756 + 1697028025 = 180234^2 + 41195^2 .

It is an emirp because it is prime and its reverse (18722318143) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34181322781 - 2²¹ = 34179225629 is a prime.

It is a super-2 number, since 2×34181322781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34181302781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17090661390 + 17090661391.

It is an arithmetic number, because the mean of its divisors is an integer number (17090661391).

Almost surely, 2^34181322781 is an apocalyptic number.

It is an amenable number.

34181322781 is a deficient number, since it is larger than the sum of its proper divisors (1).

34181322781 is an equidigital number, since it uses as much as digits as its factorization.

34181322781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 40.

The spelling of 34181322781 in words is "thirty-four billion, one hundred eighty-one million, three hundred twenty-two thousand, seven hundred eighty-one".