648017671 has 4 divisors (see below), whose sum is σ = 740591632. Its totient is φ = 555443712.

The previous prime is 648017653. The next prime is 648017677. The reversal of 648017671 is 176710846.

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 648017671 - 2¹⁷ = 647886599 is a prime.

It is a super-3 number, since 3×648017671³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648017677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46286970 + ... + 46286983.

It is an arithmetic number, because the mean of its divisors is an integer number (185147908).

Almost surely, 2^648017671 is an apocalyptic number.

648017671 is a deficient number, since it is larger than the sum of its proper divisors (92573961).

648017671 is an equidigital number, since it uses as much as digits as its factorization.

648017671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92573960.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 648017671 is about 25456.1912115697. The cubic root of 648017671 is about 865.3576081599.

The spelling of 648017671 in words is "six hundred forty-eight million, seventeen thousand, six hundred seventy-one".