4064640121 has 2 divisors, whose sum is σ = 4064640122. Its totient is φ = 4064640120.

The previous prime is 4064640101. The next prime is 4064640161. The reversal of 4064640121 is 1210464604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3397141225 + 667498896 = 58285^2 + 25836^2 .

It is a cyclic number.

It is not a de Polignac number, because 4064640121 - 2⁷ = 4064639993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4064640121.

It is not a weakly prime, because it can be changed into another prime (4064640101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2032320060 + 2032320061.

It is an arithmetic number, because the mean of its divisors is an integer number (2032320061).

Almost surely, 2^4064640121 is an apocalyptic number.

It is an amenable number.

4064640121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4064640121 is an equidigital number, since it uses as much as digits as its factorization.

4064640121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 4064640121 is about 63754.5301998219. The cubic root of 4064640121 is about 1595.9062169429.

The spelling of 4064640121 in words is "four billion, sixty-four million, six hundred forty thousand, one hundred twenty-one".