648577667853 has 12 divisors (see below), whose sum is σ = 940855160700. Its totient is φ = 430529380416.

The previous prime is 648577667849. The next prime is 648577667867. The reversal of 648577667853 is 358766775846.

648577667853 is a `hidden beast` number, since 6 + 48 + 577 + 6 + 6 + 7 + 8 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 192814957449 + 455762710404 = 439107^2 + 675102^2 .

It is not a de Polignac number, because 648577667853 - 2² = 648577667849 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648577267853) 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 11 ways as a sum of consecutive naturals, for example, 154642078 + ... + 154646271.

It is an arithmetic number, because the mean of its divisors is an integer number (78404596725).

Almost surely, 2^648577667853 is an apocalyptic number.

It is an amenable number.

648577667853 is a deficient number, since it is larger than the sum of its proper divisors (292277492847).

648577667853 is a wasteful number, since it uses less digits than its factorization.

648577667853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309288588 (or 309288585 counting only the distinct ones).

The product of its digits is 1422489600, while the sum is 72.

The spelling of 648577667853 in words is "six hundred forty-eight billion, five hundred seventy-seven million, six hundred sixty-seven thousand, eight hundred fifty-three".