40807244388181 has 2 divisors, whose sum is σ = 40807244388182. Its totient is φ = 40807244388180.

The previous prime is 40807244388173. The next prime is 40807244388259. The reversal of 40807244388181 is 18188344270804.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35629366893156 + 5177877495025 = 5969034^2 + 2275495^2 .

It is a cyclic number.

It is not a de Polignac number, because 40807244388181 - 2³ = 40807244388173 is a prime.

It is a super-2 number, since 2×40807244388181² (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 (40807244388121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20403622194090 + 20403622194091.

It is an arithmetic number, because the mean of its divisors is an integer number (20403622194091).

Almost surely, 2^{40807244388181} is an apocalyptic number.

It is an amenable number.

40807244388181 is a deficient number, since it is larger than the sum of its proper divisors (1).

40807244388181 is an equidigital number, since it uses as much as digits as its factorization.

40807244388181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11010048, while the sum is 58.

The spelling of 40807244388181 in words is "forty trillion, eight hundred seven billion, two hundred forty-four million, three hundred eighty-eight thousand, one hundred eighty-one".