2163867505 has 16 divisors (see below), whose sum is σ = 2611861200. Its totient is φ = 1720972288.

The previous prime is 2163867499. The next prime is 2163867553. The reversal of 2163867505 is 5057683612.

It can be written as a sum of positive squares in 8 ways, for example, as 24990001 + 2138877504 = 4999^2 + 46248^2 .

It is a cyclic number.

It is not a de Polignac number, because 2163867505 - 2²⁷ = 2029649777 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1109271 + ... + 1111219.

It is an arithmetic number, because the mean of its divisors is an integer number (163241325).

Almost surely, 2^2163867505 is an apocalyptic number.

It is an amenable number.

2163867505 is a deficient number, since it is larger than the sum of its proper divisors (447993695).

2163867505 is a wasteful number, since it uses less digits than its factorization.

2163867505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 2163867505 is about 46517.3892754097. The cubic root of 2163867505 is about 1293.4318620615.

The spelling of 2163867505 in words is "two billion, one hundred sixty-three million, eight hundred sixty-seven thousand, five hundred five".