648061571 has 8 divisors (see below), whose sum is σ = 655393200. Its totient is φ = 640755360.

The previous prime is 648061553. The next prime is 648061591. The reversal of 648061571 is 175160846.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648061571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648061511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47465 + ... + 59573.

It is an arithmetic number, because the mean of its divisors is an integer number (81924150).

Almost surely, 2^648061571 is an apocalyptic number.

648061571 is a deficient number, since it is larger than the sum of its proper divisors (7331629).

648061571 is a wasteful number, since it uses less digits than its factorization.

648061571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12709.

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

The square root of 648061571 is about 25457.0534626457. The cubic root of 648061571 is about 865.3771489548.

The spelling of 648061571 in words is "six hundred forty-eight million, sixty-one thousand, five hundred seventy-one".