2175279863689 has 9 divisors (see below), whose sum is σ = 2206455343239. Its totient is φ = 2144538877320.

The previous prime is 2175279863657. The next prime is 2175279863749. The reversal of 2175279863689 is 9863689725712.

The square root of 2175279863689 is 1474883.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2041683765625 + 133596098064 = 1428875^2 + 365508^2 .

It is not a de Polignac number, because 2175279863689 - 2⁵ = 2175279863657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2175279863189) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 104706307 + ... + 104727079.

Almost surely, 2^{2175279863689} is an apocalyptic number.

2175279863689 is the 1474883-rd square number.

2175279863689 is the 737442-nd centered octagonal number.

It is an amenable number.

2175279863689 is a deficient number, since it is larger than the sum of its proper divisors (31175479550).

2175279863689 is an frugal number, since it uses more digits than its factorization.

2175279863689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41688 (or 20844 counting only the distinct ones).

The product of its digits is 548674560, while the sum is 73.

The spelling of 2175279863689 in words is "two trillion, one hundred seventy-five billion, two hundred seventy-nine million, eight hundred sixty-three thousand, six hundred eighty-nine".