2127979665 has 48 divisors (see below), whose sum is σ = 4398720768. Its totient is φ = 930492288.

The previous prime is 2127979643. The next prime is 2127979703. The reversal of 2127979665 is 5669797212.

It is not a de Polignac number, because 2127979665 - 2¹² = 2127975569 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 139614 + ... + 154103.

It is an arithmetic number, because the mean of its divisors is an integer number (91640016).

Almost surely, 2^2127979665 is an apocalyptic number.

It is an amenable number.

2127979665 is an abundant number, since it is smaller than the sum of its proper divisors (2270741103).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2127979665 is a wasteful number, since it uses less digits than its factorization.

2127979665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293758 (or 293755 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 2127979665 is about 46130.0299696413. The cubic root of 2127979665 is about 1286.2414211760.

The spelling of 2127979665 in words is "two billion, one hundred twenty-seven million, nine hundred seventy-nine thousand, six hundred sixty-five".