41661635443 has 2 divisors, whose sum is σ = 41661635444. Its totient is φ = 41661635442.

The previous prime is 41661635441. The next prime is 41661635459. The reversal of 41661635443 is 34453616614.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 41661635443 - 2¹ = 41661635441 is a prime.

Together with 41661635441, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 41661635443.

It is not a weakly prime, because it can be changed into another prime (41661635441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20830817721 + 20830817722.

It is an arithmetic number, because the mean of its divisors is an integer number (20830817722).

Almost surely, 2^41661635443 is an apocalyptic number.

41661635443 is a deficient number, since it is larger than the sum of its proper divisors (1).

41661635443 is an equidigital number, since it uses as much as digits as its factorization.

41661635443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 43.

The spelling of 41661635443 in words is "forty-one billion, six hundred sixty-one million, six hundred thirty-five thousand, four hundred forty-three".