40052005561 has 2 divisors, whose sum is σ = 40052005562. Its totient is φ = 40052005560.

The previous prime is 40052005547. The next prime is 40052005571. The reversal of 40052005561 is 16550025004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37861765561 + 2190240000 = 194581^2 + 46800^2 .

It is a cyclic number.

It is not a de Polignac number, because 40052005561 - 2¹¹ = 40052003513 is a prime.

It is not a weakly prime, because it can be changed into another prime (40052005571) 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, 20026002780 + 20026002781.

It is an arithmetic number, because the mean of its divisors is an integer number (20026002781).

Almost surely, 2^40052005561 is an apocalyptic number.

It is an amenable number.

40052005561 is a deficient number, since it is larger than the sum of its proper divisors (1).

40052005561 is an equidigital number, since it uses as much as digits as its factorization.

40052005561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 40052005561 in words is "forty billion, fifty-two million, five thousand, five hundred sixty-one".