181473544009 has 2 divisors, whose sum is σ = 181473544010. Its totient is φ = 181473544008.

The previous prime is 181473543947. The next prime is 181473544027. The reversal of 181473544009 is 900445374181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181350777609 + 122766400 = 425853^2 + 11080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181473544009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 181473544009.

It is not a weakly prime, because it can be changed into another prime (181473544099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90736772004 + 90736772005.

It is an arithmetic number, because the mean of its divisors is an integer number (90736772005).

Almost surely, 2^181473544009 is an apocalyptic number.

It is an amenable number.

181473544009 is a deficient number, since it is larger than the sum of its proper divisors (1).

181473544009 is an equidigital number, since it uses as much as digits as its factorization.

181473544009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 181473544009 in words is "one hundred eighty-one billion, four hundred seventy-three million, five hundred forty-four thousand, nine".