181745084537 has 2 divisors, whose sum is σ = 181745084538. Its totient is φ = 181745084536.

The previous prime is 181745084527. The next prime is 181745084569. The reversal of 181745084537 is 735480547181.

It is a happy number.

181745084537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121669113721 + 60075970816 = 348811^2 + 245104^2 .

It is a cyclic number.

It is not a de Polignac number, because 181745084537 - 2²⁶ = 181677975673 is a prime.

It is a super-2 number, since 2×181745084537² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (181745084527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90872542268 + 90872542269.

It is an arithmetic number, because the mean of its divisors is an integer number (90872542269).

Almost surely, 2^181745084537 is an apocalyptic number.

It is an amenable number.

181745084537 is a deficient number, since it is larger than the sum of its proper divisors (1).

181745084537 is an equidigital number, since it uses as much as digits as its factorization.

181745084537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 181745084537 in words is "one hundred eighty-one billion, seven hundred forty-five million, eighty-four thousand, five hundred thirty-seven".