2165713856 has 56 divisors (see below), whose sum is σ = 4508504064. Its totient is φ = 1030219520.

The previous prime is 2165713853. The next prime is 2165713867. The reversal of 2165713856 is 6583175612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165713853) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 277301 + ... + 285003.

Almost surely, 2^2165713856 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 2165713856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2254252032).

2165713856 is an abundant number, since it is smaller than the sum of its proper divisors (2342790208).

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

2165713856 is a wasteful number, since it uses less digits than its factorization.

2165713856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7929 (or 7919 counting only the distinct ones).

The product of its digits is 302400, while the sum is 44.

The square root of 2165713856 is about 46537.2308587436. The cubic root of 2165713856 is about 1293.7996372439.

The spelling of 2165713856 in words is "two billion, one hundred sixty-five million, seven hundred thirteen thousand, eight hundred fifty-six".