271648665 has 12 divisors (see below), whose sum is σ = 470857764. Its totient is φ = 144879264.

The previous prime is 271648651. The next prime is 271648667. The reversal of 271648665 is 566846172.

It can be written as a sum of positive squares in 2 ways, for example, as 154554624 + 117094041 = 12432^2 + 10821^2 .

It is not a de Polignac number, because 271648665 - 2⁵ = 271648633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 6036637 = 271648665 / (2 + 7 + 1 + 6 + 4 + 8 + 6 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 271648665.

It is not an unprimeable number, because it can be changed into a prime (271648667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3018274 + ... + 3018363.

It is an arithmetic number, because the mean of its divisors is an integer number (39238147).

Almost surely, 2^271648665 is an apocalyptic number.

It is an amenable number.

271648665 is a deficient number, since it is larger than the sum of its proper divisors (199209099).

271648665 is a wasteful number, since it uses less digits than its factorization.

271648665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6036648 (or 6036645 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 271648665 is about 16481.7676539866. The cubic root of 271648665 is about 647.6432721623.

The spelling of 271648665 in words is "two hundred seventy-one million, six hundred forty-eight thousand, six hundred sixty-five".