2128776673 has 2 divisors, whose sum is σ = 2128776674. Its totient is φ = 2128776672.

The previous prime is 2128776589. The next prime is 2128776677. The reversal of 2128776673 is 3766778212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1706350864 + 422425809 = 41308^2 + 20553^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128776673 - 2⁹ = 2128776161 is a prime.

It is not a weakly prime, because it can be changed into another prime (2128776677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064388336 + 1064388337.

It is an arithmetic number, because the mean of its divisors is an integer number (1064388337).

Almost surely, 2^2128776673 is an apocalyptic number.

It is an amenable number.

2128776673 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128776673 is an equidigital number, since it uses as much as digits as its factorization.

2128776673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 49.

The square root of 2128776673 is about 46138.6678719705. The cubic root of 2128776673 is about 1286.4019829773.

The spelling of 2128776673 in words is "two billion, one hundred twenty-eight million, seven hundred seventy-six thousand, six hundred seventy-three".