2161680750 has 128 divisors (see below), whose sum is σ = 6021025920. Its totient is φ = 573955200.

The previous prime is 2161680721. The next prime is 2161680757. The reversal of 2161680750 is 570861612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161680757) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 1977204 + ... + 1978296.

It is an arithmetic number, because the mean of its divisors is an integer number (47039265).

Almost surely, 2^2161680750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2161680750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3010512960).

2161680750 is an abundant number, since it is smaller than the sum of its proper divisors (3859345170).

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

2161680750 is a wasteful number, since it uses less digits than its factorization.

2161680750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412 (or 1396 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 2161680750 is about 46493.8786293422. The cubic root of 2161680750 is about 1292.9960109911.

The spelling of 2161680750 in words is "two billion, one hundred sixty-one million, six hundred eighty thousand, seven hundred fifty".