648915171 has 8 divisors (see below), whose sum is σ = 866648064. Its totient is φ = 431896200.

The previous prime is 648915149. The next prime is 648915173. The reversal of 648915171 is 171519846.

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

It is not a de Polignac number, because 648915171 - 2⁹ = 648914659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648915173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176355 + ... + 179996.

It is an arithmetic number, because the mean of its divisors is an integer number (108331008).

Almost surely, 2^648915171 is an apocalyptic number.

648915171 is a deficient number, since it is larger than the sum of its proper divisors (217732893).

648915171 is a wasteful number, since it uses less digits than its factorization.

648915171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356961.

The product of its digits is 60480, while the sum is 42.

The square root of 648915171 is about 25473.8134365470. The cubic root of 648915171 is about 865.7569286353.

The spelling of 648915171 in words is "six hundred forty-eight million, nine hundred fifteen thousand, one hundred seventy-one".