2139127680 has 128 divisors (see below), whose sum is σ = 7219666080. Its totient is φ = 536870912.

The previous prime is 2139127643. The next prime is 2139127681. The reversal of 2139127680 is 867219312.

It is a tau number, because it is divible by the number of its divisors (128).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139127681) by changing a digit.

In principle, a polygon with 2139127680 sides can be constructed with ruler and compass.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129 + ... + 65408.

Almost surely, 2^2139127680 is an apocalyptic number.

2139127680 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 2139127680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3609833040).

2139127680 is an abundant number, since it is smaller than the sum of its proper divisors (5080538400).

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

2139127680 is a wasteful number, since it uses less digits than its factorization.

2139127680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65576 (or 65564 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 2139127680 is about 46250.7046432808. The cubic root of 2139127680 is about 1288.4836217369.

The spelling of 2139127680 in words is "two billion, one hundred thirty-nine million, one hundred twenty-seven thousand, six hundred eighty".