41664943121 has 4 divisors (see below), whose sum is σ = 41665388544. Its totient is φ = 41664497700.

The previous prime is 41664943109. The next prime is 41664943129. The reversal of 41664943121 is 12134946614.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41664943121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41664943129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22265 + ... + 289526.

It is an arithmetic number, because the mean of its divisors is an integer number (10416347136).

Almost surely, 2^41664943121 is an apocalyptic number.

It is an amenable number.

41664943121 is a deficient number, since it is larger than the sum of its proper divisors (445423).

41664943121 is a wasteful number, since it uses less digits than its factorization.

41664943121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445422.

The product of its digits is 124416, while the sum is 41.

The spelling of 41664943121 in words is "forty-one billion, six hundred sixty-four million, nine hundred forty-three thousand, one hundred twenty-one".