4405541116621 has 2 divisors, whose sum is σ = 4405541116622. Its totient is φ = 4405541116620.

The previous prime is 4405541116609. The next prime is 4405541116631. The reversal of 4405541116621 is 1266111455044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2871621711396 + 1533919405225 = 1694586^2 + 1238515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4405541116621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4405541116601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2202770558310 + 2202770558311.

It is an arithmetic number, because the mean of its divisors is an integer number (2202770558311).

Almost surely, 2^{4405541116621} is an apocalyptic number.

It is an amenable number.

4405541116621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4405541116621 is an equidigital number, since it uses as much as digits as its factorization.

4405541116621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 4405541116621 in words is "four trillion, four hundred five billion, five hundred forty-one million, one hundred sixteen thousand, six hundred twenty-one".