2168963505 has 24 divisors (see below), whose sum is σ = 3889178280. Its totient is φ = 1116890880.

The previous prime is 2168963501. The next prime is 2168963507. The reversal of 2168963505 is 5053698612.

2168963505 is a `hidden beast` number, since 2 + 1 + 6 + 8 + 9 + 635 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 785793024 + 1383170481 = 28032^2 + 37191^2 .

It is not a de Polignac number, because 2168963505 - 2² = 2168963501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2168963501) 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 23 ways as a sum of consecutive naturals, for example, 829716 + ... + 832325.

It is an arithmetic number, because the mean of its divisors is an integer number (162049095).

Almost surely, 2^2168963505 is an apocalyptic number.

It is an amenable number.

2168963505 is a deficient number, since it is larger than the sum of its proper divisors (1720214775).

2168963505 is a wasteful number, since it uses less digits than its factorization.

2168963505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662081 (or 1662078 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 2168963505 is about 46572.1322788639. The cubic root of 2168963505 is about 1294.4464283765.

The spelling of 2168963505 in words is "two billion, one hundred sixty-eight million, nine hundred sixty-three thousand, five hundred five".