41553541040021 has 2 divisors, whose sum is σ = 41553541040022. Its totient is φ = 41553541040020.

The previous prime is 41553541040003. The next prime is 41553541040071. The reversal of 41553541040021 is 12004014535514.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30410702868100 + 11142838171921 = 5514590^2 + 3338089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41553541040021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41553541040071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20776770520010 + 20776770520011.

It is an arithmetic number, because the mean of its divisors is an integer number (20776770520011).

Almost surely, 2^{41553541040021} is an apocalyptic number.

It is an amenable number.

41553541040021 is a deficient number, since it is larger than the sum of its proper divisors (1).

41553541040021 is an equidigital number, since it uses as much as digits as its factorization.

41553541040021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 41553541040021 its reverse (12004014535514), we get a palindrome (53557555575535).

The spelling of 41553541040021 in words is "forty-one trillion, five hundred fifty-three billion, five hundred forty-one million, forty thousand, twenty-one".