648612736 has 16 divisors (see below), whose sum is σ = 1292158440. Its totient is φ = 324306304.

The previous prime is 648612703. The next prime is 648612751. The reversal of 648612736 is 637216846.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 648612692 and 648612701.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2533516 + ... + 2533771.

Almost surely, 2^648612736 is an apocalyptic number.

It is an amenable number.

648612736 is a deficient number, since it is larger than the sum of its proper divisors (643545704).

648612736 is an equidigital number, since it uses as much as digits as its factorization.

648612736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5067301 (or 5067289 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 648612736 is about 25467.8765506667. The cubic root of 648612736 is about 865.6224088007.

The spelling of 648612736 in words is "six hundred forty-eight million, six hundred twelve thousand, seven hundred thirty-six".