4445161354021 has 2 divisors, whose sum is σ = 4445161354022. Its totient is φ = 4445161354020.

The previous prime is 4445161353991. The next prime is 4445161354031. The reversal of 4445161354021 is 1204531615444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3296352523396 + 1148808830625 = 1815586^2 + 1071825^2 .

It is a cyclic number.

It is not a de Polignac number, because 4445161354021 - 2²³ = 4445152965413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4445161354031) 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, 2222580677010 + 2222580677011.

It is an arithmetic number, because the mean of its divisors is an integer number (2222580677011).

Almost surely, 2^{4445161354021} is an apocalyptic number.

It is an amenable number.

4445161354021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4445161354021 is an equidigital number, since it uses as much as digits as its factorization.

4445161354021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 40.

Adding to 4445161354021 its reverse (1204531615444), we get a palindrome (5649692969465).

The spelling of 4445161354021 in words is "four trillion, four hundred forty-five billion, one hundred sixty-one million, three hundred fifty-four thousand, twenty-one".