2128664330 has 32 divisors (see below), whose sum is σ = 4130956368. Its totient is φ = 785088000.

The previous prime is 2128664323. The next prime is 2128664341. The reversal of 2128664330 is 334668212.

It can be written as a sum of positive squares in 8 ways, for example, as 727434841 + 1401229489 = 26971^2 + 37433^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113630 + ... + 131030.

Almost surely, 2^2128664330 is an apocalyptic number.

2128664330 is a deficient number, since it is larger than the sum of its proper divisors (2002292038).

2128664330 is a wasteful number, since it uses less digits than its factorization.

2128664330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18362.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 2128664330 is about 46137.4504063673. The cubic root of 2128664330 is about 1286.3793532666.

The spelling of 2128664330 in words is "two billion, one hundred twenty-eight million, six hundred sixty-four thousand, three hundred thirty".