648744871 has 8 divisors (see below), whose sum is σ = 687219120. Its totient is φ = 610305408.

The previous prime is 648744847. The next prime is 648744893. The reversal of 648744871 is 178447846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648744871 - 2⁷ = 648744743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648744841) 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 7 ways as a sum of consecutive naturals, for example, 36445 + ... + 51241.

It is an arithmetic number, because the mean of its divisors is an integer number (85902390).

Almost surely, 2^648744871 is an apocalyptic number.

648744871 is a deficient number, since it is larger than the sum of its proper divisors (38474249).

648744871 is a wasteful number, since it uses less digits than its factorization.

648744871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17393.

The product of its digits is 1204224, while the sum is 49.

The square root of 648744871 is about 25470.4705688764. The cubic root of 648744871 is about 865.6811861700.

The spelling of 648744871 in words is "six hundred forty-eight million, seven hundred forty-four thousand, eight hundred seventy-one".