181000564037 has 2 divisors, whose sum is σ = 181000564038. Its totient is φ = 181000564036.

The previous prime is 181000563923. The next prime is 181000564103. The reversal of 181000564037 is 730465000181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107103034756 + 73897529281 = 327266^2 + 271841^2 .

It is a cyclic number.

It is not a de Polignac number, because 181000564037 - 2¹⁰ = 181000563013 is a prime.

It is a super-2 number, since 2×181000564037² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181000563988 and 181000564006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181000564237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90500282018 + 90500282019.

It is an arithmetic number, because the mean of its divisors is an integer number (90500282019).

Almost surely, 2^181000564037 is an apocalyptic number.

It is an amenable number.

181000564037 is a deficient number, since it is larger than the sum of its proper divisors (1).

181000564037 is an equidigital number, since it uses as much as digits as its factorization.

181000564037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 181000564037 in words is "one hundred eighty-one billion, five hundred sixty-four thousand, thirty-seven".