40204124032181 has 2 divisors, whose sum is σ = 40204124032182. Its totient is φ = 40204124032180.

The previous prime is 40204124032129. The next prime is 40204124032199. The reversal of 40204124032181 is 18123042140204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39751020035281 + 453103996900 = 6304841^2 + 673130^2 .

It is a cyclic number.

It is not a de Polignac number, because 40204124032181 - 2²² = 40204119837877 is a prime.

It is a super-2 number, since 2×40204124032181² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40204124035181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20102062016090 + 20102062016091.

It is an arithmetic number, because the mean of its divisors is an integer number (20102062016091).

Almost surely, 2^{40204124032181} is an apocalyptic number.

It is an amenable number.

40204124032181 is a deficient number, since it is larger than the sum of its proper divisors (1).

40204124032181 is an equidigital number, since it uses as much as digits as its factorization.

40204124032181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 32.

Adding to 40204124032181 its reverse (18123042140204), we get a palindrome (58327166172385).

The spelling of 40204124032181 in words is "forty trillion, two hundred four billion, one hundred twenty-four million, thirty-two thousand, one hundred eighty-one".