648312944 has 10 divisors (see below), whose sum is σ = 1256106360. Its totient is φ = 324156464.

The previous prime is 648312943. The next prime is 648312961. The reversal of 648312944 is 449213846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648312943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20259764 + ... + 20259795.

It is an arithmetic number, because the mean of its divisors is an integer number (125610636).

Almost surely, 2^648312944 is an apocalyptic number.

It is an amenable number.

648312944 is a deficient number, since it is larger than the sum of its proper divisors (607793416).

648312944 is a wasteful number, since it uses less digits than its factorization.

648312944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40519567 (or 40519561 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 648312944 is about 25461.9901814450. The cubic root of 648312944 is about 865.4890232684.

The spelling of 648312944 in words is "six hundred forty-eight million, three hundred twelve thousand, nine hundred forty-four".