671828265 has 48 divisors (see below), whose sum is σ = 1198650960. Its totient is φ = 347942400.

The previous prime is 671828263. The next prime is 671828273. The reversal of 671828265 is 562828176.

It can be written as a sum of positive squares in 8 ways, for example, as 102576384 + 569251881 = 10128^2 + 23859^2 .

It is not a de Polignac number, because 671828265 - 2¹ = 671828263 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 671828265.

It is not an unprimeable number, because it can be changed into a prime (671828263) 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 47 ways as a sum of consecutive naturals, for example, 239491 + ... + 242279.

It is an arithmetic number, because the mean of its divisors is an integer number (24971895).

Almost surely, 2^671828265 is an apocalyptic number.

It is an amenable number.

671828265 is a deficient number, since it is larger than the sum of its proper divisors (526822695).

671828265 is a wasteful number, since it uses less digits than its factorization.

671828265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954 (or 2951 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 671828265 is about 25919.6501712504. The cubic root of 671828265 is about 875.8292068666.

The spelling of 671828265 in words is "six hundred seventy-one million, eight hundred twenty-eight thousand, two hundred sixty-five".