4528145681 has 2 divisors, whose sum is σ = 4528145682. Its totient is φ = 4528145680.

The previous prime is 4528145663. The next prime is 4528145711. The reversal of 4528145681 is 1865418254.

4528145681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4523235025 + 4910656 = 67255^2 + 2216^2 .

It is a cyclic number.

It is not a de Polignac number, because 4528145681 - 2¹⁸ = 4527883537 is a prime.

It is a super-2 number, since 2×4528145681² = 41008206616717907522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4528145641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2264072840 + 2264072841.

It is an arithmetic number, because the mean of its divisors is an integer number (2264072841).

Almost surely, 2^4528145681 is an apocalyptic number.

It is an amenable number.

4528145681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4528145681 is an equidigital number, since it uses as much as digits as its factorization.

4528145681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 307200, while the sum is 44.

The square root of 4528145681 is about 67291.4978359079. The cubic root of 4528145681 is about 1654.3985098016.

The spelling of 4528145681 in words is "four billion, five hundred twenty-eight million, one hundred forty-five thousand, six hundred eighty-one".