40161108543601 has 2 divisors, whose sum is σ = 40161108543602. Its totient is φ = 40161108543600.

The previous prime is 40161108543509. The next prime is 40161108543629. The reversal of 40161108543601 is 10634580116104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33643422087025 + 6517686456576 = 5800295^2 + 2552976^2 .

It is a cyclic number.

It is not a de Polignac number, because 40161108543601 - 2¹⁹ = 40161108019313 is a prime.

It is a super-2 number, since 2×40161108543601² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40161108543001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20080554271800 + 20080554271801.

It is an arithmetic number, because the mean of its divisors is an integer number (20080554271801).

Almost surely, 2^{40161108543601} is an apocalyptic number.

It is an amenable number.

40161108543601 is a deficient number, since it is larger than the sum of its proper divisors (1).

40161108543601 is an equidigital number, since it uses as much as digits as its factorization.

40161108543601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 40.

Adding to 40161108543601 its reverse (10634580116104), we get a palindrome (50795688659705).

The spelling of 40161108543601 in words is "forty trillion, one hundred sixty-one billion, one hundred eight million, five hundred forty-three thousand, six hundred one".