41203231661 has 2 divisors, whose sum is σ = 41203231662. Its totient is φ = 41203231660.

The previous prime is 41203231631. The next prime is 41203231673. The reversal of 41203231661 is 16613230214.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24916622500 + 16286609161 = 157850^2 + 127619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41203231661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41203231631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20601615830 + 20601615831.

It is an arithmetic number, because the mean of its divisors is an integer number (20601615831).

Almost surely, 2^41203231661 is an apocalyptic number.

It is an amenable number.

41203231661 is a deficient number, since it is larger than the sum of its proper divisors (1).

41203231661 is an equidigital number, since it uses as much as digits as its factorization.

41203231661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 41203231661 its reverse (16613230214), we get a palindrome (57816461875).

The spelling of 41203231661 in words is "forty-one billion, two hundred three million, two hundred thirty-one thousand, six hundred sixty-one".