2175625728 has 120 divisors (see below), whose sum is σ = 6648595668. Its totient is φ = 682524672.

The previous prime is 2175625709. The next prime is 2175625759. The reversal of 2175625728 is 8275265712.

2175625728 is a `hidden beast` number, since 2 + 1 + 75 + 6 + 2 + 572 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2074984704 + 100641024 = 45552^2 + 10032^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64450 + ... + 92222.

Almost surely, 2^2175625728 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 2175625728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3324297834).

2175625728 is an abundant number, since it is smaller than the sum of its proper divisors (4472969940).

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

2175625728 is a wasteful number, since it uses less digits than its factorization.

2175625728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27814 (or 27795 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 2175625728 is about 46643.6032913410. The cubic root of 2175625728 is about 1295.7704211537.

The spelling of 2175625728 in words is "two billion, one hundred seventy-five million, six hundred twenty-five thousand, seven hundred twenty-eight".