40163000681 has 2 divisors, whose sum is σ = 40163000682. Its totient is φ = 40163000680.

The previous prime is 40163000597. The next prime is 40163000737. The reversal of 40163000681 is 18600036104.

40163000681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35450864656 + 4712136025 = 188284^2 + 68645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40163000681 is a prime.

It is a super-2 number, since 2×40163000681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40163000281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20081500340 + 20081500341.

It is an arithmetic number, because the mean of its divisors is an integer number (20081500341).

Almost surely, 2^40163000681 is an apocalyptic number.

It is an amenable number.

40163000681 is a deficient number, since it is larger than the sum of its proper divisors (1).

40163000681 is an equidigital number, since it uses as much as digits as its factorization.

40163000681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 40163000681 its reverse (18600036104), we get a palindrome (58763036785).

The spelling of 40163000681 in words is "forty billion, one hundred sixty-three million, six hundred eighty-one", and thus it is an aban number.