40541490581 has 2 divisors, whose sum is σ = 40541490582. Its totient is φ = 40541490580.

The previous prime is 40541490553. The next prime is 40541490607. The reversal of 40541490581 is 18509414504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22737925681 + 17803564900 = 150791^2 + 133430^2 .

It is a cyclic number.

It is not a de Polignac number, because 40541490581 - 2³⁰ = 39467748757 is a prime.

It is a super-2 number, since 2×40541490581² (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 (40541490551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20270745290 + 20270745291.

It is an arithmetic number, because the mean of its divisors is an integer number (20270745291).

Almost surely, 2^40541490581 is an apocalyptic number.

It is an amenable number.

40541490581 is a deficient number, since it is larger than the sum of its proper divisors (1).

40541490581 is an equidigital number, since it uses as much as digits as its factorization.

40541490581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 41.

The spelling of 40541490581 in words is "forty billion, five hundred forty-one million, four hundred ninety thousand, five hundred eighty-one".