4128888961 has 2 divisors, whose sum is σ = 4128888962. Its totient is φ = 4128888960.

The previous prime is 4128888937. The next prime is 4128888983. The reversal of 4128888961 is 1698888214.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4116505600 + 12383361 = 64160^2 + 3519^2 .

It is a cyclic number.

It is not a de Polignac number, because 4128888961 - 2¹¹ = 4128886913 is a prime.

It is not a weakly prime, because it can be changed into another prime (4128888901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064444480 + 2064444481.

It is an arithmetic number, because the mean of its divisors is an integer number (2064444481).

Almost surely, 2^4128888961 is an apocalyptic number.

It is an amenable number.

4128888961 is a deficient number, since it is larger than the sum of its proper divisors (1).

4128888961 is an equidigital number, since it uses as much as digits as its factorization.

4128888961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1769472, while the sum is 55.

The square root of 4128888961 is about 64256.4312812344. The cubic root of 4128888961 is about 1604.2710057212.

The spelling of 4128888961 in words is "four billion, one hundred twenty-eight million, eight hundred eighty-eight thousand, nine hundred sixty-one".