84530433181 has 2 divisors, whose sum is σ = 84530433182. Its totient is φ = 84530433180.

The previous prime is 84530433131. The next prime is 84530433187. The reversal of 84530433181 is 18133403548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77556680100 + 6973753081 = 278490^2 + 83509^2 .

It is a cyclic number.

It is not a de Polignac number, because 84530433181 - 2¹¹ = 84530431133 is a prime.

It is a super-2 number, since 2×84530433181² (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 (84530433187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42265216590 + 42265216591.

It is an arithmetic number, because the mean of its divisors is an integer number (42265216591).

Almost surely, 2^84530433181 is an apocalyptic number.

It is an amenable number.

84530433181 is a deficient number, since it is larger than the sum of its proper divisors (1).

84530433181 is an equidigital number, since it uses as much as digits as its factorization.

84530433181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 84530433181 in words is "eighty-four billion, five hundred thirty million, four hundred thirty-three thousand, one hundred eighty-one".