4457165021 has 2 divisors, whose sum is σ = 4457165022. Its totient is φ = 4457165020.

The previous prime is 4457164993. The next prime is 4457165029. The reversal of 4457165021 is 1205617544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4354548121 + 102616900 = 65989^2 + 10130^2 .

It is a cyclic number.

It is not a de Polignac number, because 4457165021 - 2²⁶ = 4390056157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4457165029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2228582510 + 2228582511.

It is an arithmetic number, because the mean of its divisors is an integer number (2228582511).

Almost surely, 2^4457165021 is an apocalyptic number.

It is an amenable number.

4457165021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4457165021 is an equidigital number, since it uses as much as digits as its factorization.

4457165021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 4457165021 is about 66762.0028234624. The cubic root of 4457165021 is about 1645.7084707416.

The spelling of 4457165021 in words is "four billion, four hundred fifty-seven million, one hundred sixty-five thousand, twenty-one".