2121669568 has 28 divisors (see below), whose sum is σ = 4214886160. Its totient is φ = 1059651072.

The previous prime is 2121669533. The next prime is 2121669587. The reversal of 2121669568 is 8659661212.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 40780 + ... + 76852.

Almost surely, 2^2121669568 is an apocalyptic number.

It is an amenable number.

2121669568 is a deficient number, since it is larger than the sum of its proper divisors (2093216592).

2121669568 is an equidigital number, since it uses as much as digits as its factorization.

2121669568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37004 (or 36994 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 2121669568 is about 46061.5845146473. The cubic root of 2121669568 is about 1284.9687987700.

The spelling of 2121669568 in words is "two billion, one hundred twenty-one million, six hundred sixty-nine thousand, five hundred sixty-eight".