41820871685 has 4 divisors (see below), whose sum is σ = 50185046028. Its totient is φ = 33456697344.

The previous prime is 41820871657. The next prime is 41820871693. The reversal of 41820871685 is 58617802814.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58617802814 = 2 ⋅29308901407.

It can be written as a sum of positive squares in 2 ways, for example, as 5181552289 + 36639319396 = 71983^2 + 191414^2 .

It is a cyclic number.

It is not a de Polignac number, because 41820871685 - 2¹⁰ = 41820870661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4182087164 + ... + 4182087173.

It is an arithmetic number, because the mean of its divisors is an integer number (12546261507).

Almost surely, 2^41820871685 is an apocalyptic number.

It is an amenable number.

41820871685 is a deficient number, since it is larger than the sum of its proper divisors (8364174343).

41820871685 is an equidigital number, since it uses as much as digits as its factorization.

41820871685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8364174342.

The product of its (nonzero) digits is 860160, while the sum is 50.

The spelling of 41820871685 in words is "forty-one billion, eight hundred twenty million, eight hundred seventy-one thousand, six hundred eighty-five".