11541443621 has 2 divisors, whose sum is σ = 11541443622. Its totient is φ = 11541443620.

The previous prime is 11541443609. The next prime is 11541443629. The reversal of 11541443621 is 12634414511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10386463396 + 1154980225 = 101914^2 + 33985^2 .

It is a cyclic number.

It is not a de Polignac number, because 11541443621 - 2¹⁴ = 11541427237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11541443629) 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 as a sum of consecutive naturals, namely, 5770721810 + 5770721811.

It is an arithmetic number, because the mean of its divisors is an integer number (5770721811).

Almost surely, 2^11541443621 is an apocalyptic number.

It is an amenable number.

11541443621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11541443621 is an equidigital number, since it uses as much as digits as its factorization.

11541443621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The spelling of 11541443621 in words is "eleven billion, five hundred forty-one million, four hundred forty-three thousand, six hundred twenty-one".