40416313181 has 2 divisors, whose sum is σ = 40416313182. Its totient is φ = 40416313180.

The previous prime is 40416313151. The next prime is 40416313229. The reversal of 40416313181 is 18131361404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27586220281 + 12830092900 = 166091^2 + 113270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40416313181 is a prime.

It is a super-2 number, since 2×40416313181² (a number of 22 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 (40416313151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20208156590 + 20208156591.

It is an arithmetic number, because the mean of its divisors is an integer number (20208156591).

Almost surely, 2^40416313181 is an apocalyptic number.

It is an amenable number.

40416313181 is a deficient number, since it is larger than the sum of its proper divisors (1).

40416313181 is an equidigital number, since it uses as much as digits as its factorization.

40416313181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

Adding to 40416313181 its reverse (18131361404), we get a palindrome (58547674585).

The spelling of 40416313181 in words is "forty billion, four hundred sixteen million, three hundred thirteen thousand, one hundred eighty-one".