648855538 has 8 divisors (see below), whose sum is σ = 973685232. Its totient is φ = 324293796.

The previous prime is 648855533. The next prime is 648855547. The reversal of 648855538 is 835558846.

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

It is not an unprimeable number, because it can be changed into a prime (648855533) 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, 60820 + ... + 70687.

It is an arithmetic number, because the mean of its divisors is an integer number (121710654).

Almost surely, 2^648855538 is an apocalyptic number.

648855538 is a deficient number, since it is larger than the sum of its proper divisors (324829694).

648855538 is a wasteful number, since it uses less digits than its factorization.

648855538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133976.

The product of its digits is 4608000, while the sum is 52.

The square root of 648855538 is about 25472.6429331548. The cubic root of 648855538 is about 865.7304078271.

It can be divided in two parts, 6488 and 55538, that added together give a palindrome (62026).

The spelling of 648855538 in words is "six hundred forty-eight million, eight hundred fifty-five thousand, five hundred thirty-eight".