648972265 has 16 divisors (see below), whose sum is σ = 820494720. Its totient is φ = 491408640.

The previous prime is 648972253. The next prime is 648972283. The reversal of 648972265 is 562279846.

It is a de Polignac number, because none of the positive numbers 2^k-648972265 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 135105 + ... + 139825.

It is an arithmetic number, because the mean of its divisors is an integer number (51280920).

Almost surely, 2^648972265 is an apocalyptic number.

It is an amenable number.

648972265 is a deficient number, since it is larger than the sum of its proper divisors (171522455).

648972265 is a wasteful number, since it uses less digits than its factorization.

648972265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6192.

The product of its digits is 1451520, while the sum is 49.

The square root of 648972265 is about 25474.9340529078. The cubic root of 648972265 is about 865.7823187421.

The spelling of 648972265 in words is "six hundred forty-eight million, nine hundred seventy-two thousand, two hundred sixty-five".