2139872560 has 80 divisors (see below), whose sum is σ = 5702760000. Its totient is φ = 731501568.

The previous prime is 2139872531. The next prime is 2139872611. The reversal of 2139872560 is 652789312.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189966 + ... + 200914.

It is an arithmetic number, because the mean of its divisors is an integer number (71284500).

Almost surely, 2^2139872560 is an apocalyptic number.

2139872560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139872560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2851380000).

2139872560 is an abundant number, since it is smaller than the sum of its proper divisors (3562887440).

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

2139872560 is a wasteful number, since it uses less digits than its factorization.

2139872560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11318 (or 11312 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 2139872560 is about 46258.7565764580. The cubic root of 2139872560 is about 1288.6331615561.

The spelling of 2139872560 in words is "two billion, one hundred thirty-nine million, eight hundred seventy-two thousand, five hundred sixty".