41822818661 has 4 divisors (see below), whose sum is σ = 45039958572. Its totient is φ = 38605678752.

The previous prime is 41822818643. The next prime is 41822818717. The reversal of 41822818661 is 16681822814.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13068833761 + 28753984900 = 114319^2 + 169570^2 .

It is a cyclic number.

It is not a de Polignac number, because 41822818661 - 2¹⁰ = 41822817637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41822818621) 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 in 3 ways as a sum of consecutive naturals, for example, 1608569936 + ... + 1608569961.

It is an arithmetic number, because the mean of its divisors is an integer number (11259989643).

Almost surely, 2^41822818661 is an apocalyptic number.

It is an amenable number.

41822818661 is a deficient number, since it is larger than the sum of its proper divisors (3217139911).

41822818661 is a wasteful number, since it uses less digits than its factorization.

41822818661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217139910.

The product of its digits is 294912, while the sum is 47.

The spelling of 41822818661 in words is "forty-one billion, eight hundred twenty-two million, eight hundred eighteen thousand, six hundred sixty-one".