648015671 has 4 divisors (see below), whose sum is σ = 656892672. Its totient is φ = 639138672.

The previous prime is 648015659. The next prime is 648015677. The reversal of 648015671 is 176510846.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 648015671 - 2⁶ = 648015607 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 (648015677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4438391 + ... + 4438536.

It is an arithmetic number, because the mean of its divisors is an integer number (164223168).

Almost surely, 2^648015671 is an apocalyptic number.

648015671 is a deficient number, since it is larger than the sum of its proper divisors (8877001).

648015671 is an equidigital number, since it uses as much as digits as its factorization.

648015671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8877000.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 648015671 is about 25456.1519283650. The cubic root of 648015671 is about 865.3567178977.

The spelling of 648015671 in words is "six hundred forty-eight million, fifteen thousand, six hundred seventy-one".