2160879978 has 16 divisors (see below), whose sum is σ = 4322525760. Its totient is φ = 720165696.

The previous prime is 2160879947. The next prime is 2160879997. The reversal of 2160879978 is 8799780612.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8763 + ... + 66321.

It is an arithmetic number, because the mean of its divisors is an integer number (270157860).

Almost surely, 2^2160879978 is an apocalyptic number.

2160879978 is an abundant number, since it is smaller than the sum of its proper divisors (2161645782).

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

2160879978 is a wasteful number, since it uses less digits than its factorization.

2160879978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63821.

The product of its (nonzero) digits is 3048192, while the sum is 57.

The square root of 2160879978 is about 46485.2662464140. The cubic root of 2160879978 is about 1292.8363323277.

The spelling of 2160879978 in words is "two billion, one hundred sixty million, eight hundred seventy-nine thousand, nine hundred seventy-eight".