2165476544 has 112 divisors (see below), whose sum is σ = 5459187456. Its totient is φ = 827673600.

The previous prime is 2165476463. The next prime is 2165476549. The reversal of 2165476544 is 4456745612.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×2165476544² = 9378577325228367872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 2165476495 and 2165476504.

It is not an unprimeable number, because it can be changed into a prime (2165476549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257039 + ... + 265329.

Almost surely, 2^2165476544 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 2165476544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2729593728).

2165476544 is an abundant number, since it is smaller than the sum of its proper divisors (3293710912).

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

2165476544 is a wasteful number, since it uses less digits than its factorization.

2165476544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8374 (or 8364 counting only the distinct ones).

The product of its digits is 806400, while the sum is 44.

The square root of 2165476544 is about 46534.6810884097. The cubic root of 2165476544 is about 1293.7523787085.

The spelling of 2165476544 in words is "two billion, one hundred sixty-five million, four hundred seventy-six thousand, five hundred forty-four".