2139911568 has 160 divisors (see below), whose sum is σ = 6260710400. Its totient is φ = 699715584.

The previous prime is 2139911489. The next prime is 2139911581. The reversal of 2139911568 is 8651199312.

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 31 ways as a sum of consecutive naturals, for example, 9344478 + ... + 9344706.

It is an arithmetic number, because the mean of its divisors is an integer number (39129440).

Almost surely, 2^2139911568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139911568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3130355200).

2139911568 is an abundant number, since it is smaller than the sum of its proper divisors (4120798832).

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

2139911568 is a wasteful number, since it uses less digits than its factorization.

2139911568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 554 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 2139911568 is about 46259.1782028172. The cubic root of 2139911568 is about 1288.6409917259.

The spelling of 2139911568 in words is "two billion, one hundred thirty-nine million, nine hundred eleven thousand, five hundred sixty-eight".