2128263653 has 2 divisors, whose sum is σ = 2128263654. Its totient is φ = 2128263652.

The previous prime is 2128263647. The next prime is 2128263661. The reversal of 2128263653 is 3563628212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2095625284 + 32638369 = 45778^2 + 5713^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128263653 - 2¹² = 2128259557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128263253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064131826 + 1064131827.

It is an arithmetic number, because the mean of its divisors is an integer number (1064131827).

Almost surely, 2^2128263653 is an apocalyptic number.

It is an amenable number.

2128263653 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128263653 is an equidigital number, since it uses as much as digits as its factorization.

2128263653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 2128263653 is about 46133.1079919834. The cubic root of 2128263653 is about 1286.2986367730.

The spelling of 2128263653 in words is "two billion, one hundred twenty-eight million, two hundred sixty-three thousand, six hundred fifty-three".