648708571 has 4 divisors (see below), whose sum is σ = 741381232. Its totient is φ = 556035912.

The previous prime is 648708553. The next prime is 648708631. The reversal of 648708571 is 175807846.

648708571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 648708571 - 2⁷ = 648708443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648708521) 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, 46336320 + ... + 46336333.

It is an arithmetic number, because the mean of its divisors is an integer number (185345308).

Almost surely, 2^648708571 is an apocalyptic number.

648708571 is a deficient number, since it is larger than the sum of its proper divisors (92672661).

648708571 is an equidigital number, since it uses as much as digits as its factorization.

648708571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92672660.

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 648708571 is about 25469.7579690110. The cubic root of 648708571 is about 865.6650397028.

It can be divided in two parts, 64870 and 8571, that added together give a square (73441 = 271²).

The spelling of 648708571 in words is "six hundred forty-eight million, seven hundred eight thousand, five hundred seventy-one".