4164472771621 has 2 divisors, whose sum is σ = 4164472771622. Its totient is φ = 4164472771620.

The previous prime is 4164472771577. The next prime is 4164472771637. The reversal of 4164472771621 is 1261772744614.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3427733799396 + 736738972225 = 1851414^2 + 858335^2 .

It is a cyclic number.

It is not a de Polignac number, because 4164472771621 - 2¹¹ = 4164472769573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4164472711621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2082236385810 + 2082236385811.

It is an arithmetic number, because the mean of its divisors is an integer number (2082236385811).

Almost surely, 2^{4164472771621} is an apocalyptic number.

It is an amenable number.

4164472771621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4164472771621 is an equidigital number, since it uses as much as digits as its factorization.

4164472771621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 52.

The spelling of 4164472771621 in words is "four trillion, one hundred sixty-four billion, four hundred seventy-two million, seven hundred seventy-one thousand, six hundred twenty-one".