505410040181 has 2 divisors, whose sum is σ = 505410040182. Its totient is φ = 505410040180.

The previous prime is 505410040169. The next prime is 505410040243. The reversal of 505410040181 is 181040014505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502184822500 + 3225217681 = 708650^2 + 56791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505410040181 is a prime.

It is a super-2 number, since 2×505410040181² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505410540181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252705020090 + 252705020091.

It is an arithmetic number, because the mean of its divisors is an integer number (252705020091).

Almost surely, 2^505410040181 is an apocalyptic number.

It is an amenable number.

505410040181 is a deficient number, since it is larger than the sum of its proper divisors (1).

505410040181 is an equidigital number, since it uses as much as digits as its factorization.

505410040181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 29.

Adding to 505410040181 its reverse (181040014505), we get a palindrome (686450054686).

The spelling of 505410040181 in words is "five hundred five billion, four hundred ten million, forty thousand, one hundred eighty-one".