648856732 has 6 divisors (see below), whose sum is σ = 1135499288. Its totient is φ = 324428364.

The previous prime is 648856727. The next prime is 648856751. The reversal of 648856732 is 237658846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81107088 + ... + 81107095.

Almost surely, 2^648856732 is an apocalyptic number.

It is an amenable number.

648856732 is a deficient number, since it is larger than the sum of its proper divisors (486642556).

648856732 is a wasteful number, since it uses less digits than its factorization.

648856732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162214187 (or 162214185 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 49.

The square root of 648856732 is about 25472.6663700524. Note that the first 3 decimals coincide. The cubic root of 648856732 is about 865.7309388551.

It can be divided in two parts, 64885 and 6732, that added together give a palindrome (71617).

The spelling of 648856732 in words is "six hundred forty-eight million, eight hundred fifty-six thousand, seven hundred thirty-two".