41988265691 has 2 divisors, whose sum is σ = 41988265692. Its totient is φ = 41988265690.

The previous prime is 41988265639. The next prime is 41988265727. The reversal of 41988265691 is 19656288914.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 41988265691 - 2²² = 41984071387 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 41988265691.

It is not a weakly prime, because it can be changed into another prime (41988267691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20994132845 + 20994132846.

It is an arithmetic number, because the mean of its divisors is an integer number (20994132846).

Almost surely, 2^41988265691 is an apocalyptic number.

41988265691 is a deficient number, since it is larger than the sum of its proper divisors (1).

41988265691 is an equidigital number, since it uses as much as digits as its factorization.

41988265691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7464960, while the sum is 59.

The spelling of 41988265691 in words is "forty-one billion, nine hundred eighty-eight million, two hundred sixty-five thousand, six hundred ninety-one".