2165575260 has 144 divisors (see below), whose sum is σ = 6535710720. Its totient is φ = 535557120.

The previous prime is 2165575259. The next prime is 2165575289. The reversal of 2165575260 is 625755612.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 1230261 + ... + 1232019.

It is an arithmetic number, because the mean of its divisors is an integer number (45386880).

Almost surely, 2^2165575260 is an apocalyptic number.

2165575260 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 2165575260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3267855360).

2165575260 is an abundant number, since it is smaller than the sum of its proper divisors (4370135460).

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

2165575260 is a wasteful number, since it uses less digits than its factorization.

2165575260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876 (or 1857 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 2165575260 is about 46535.7417476073. The cubic root of 2165575260 is about 1293.7720375251.

The spelling of 2165575260 in words is "two billion, one hundred sixty-five million, five hundred seventy-five thousand, two hundred sixty".