2163637489 has 4 divisors (see below), whose sum is σ = 2330071156. Its totient is φ = 1997203824.

The previous prime is 2163637459. The next prime is 2163637513. The reversal of 2163637489 is 9847363612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100661089 + 2062976400 = 10033^2 + 45420^2 .

It is a cyclic number.

It is not a de Polignac number, because 2163637489 - 2⁷ = 2163637361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2163637459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83216814 + ... + 83216839.

It is an arithmetic number, because the mean of its divisors is an integer number (582517789).

Almost surely, 2^2163637489 is an apocalyptic number.

It is an amenable number.

2163637489 is a deficient number, since it is larger than the sum of its proper divisors (166433667).

2163637489 is a wasteful number, since it uses less digits than its factorization.

2163637489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166433666.

The product of its digits is 1306368, while the sum is 49.

The square root of 2163637489 is about 46514.9168439545. The cubic root of 2163637489 is about 1293.3860304561.

The spelling of 2163637489 in words is "two billion, one hundred sixty-three million, six hundred thirty-seven thousand, four hundred eighty-nine".