648311712 has 48 divisors (see below), whose sum is σ = 1704179232. Its totient is φ = 215804160.

The previous prime is 648311663. The next prime is 648311717. The reversal of 648311712 is 217113846.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (648311717) 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 in 7 ways as a sum of consecutive naturals, for example, 71262 + ... + 79842.

It is an arithmetic number, because the mean of its divisors is an integer number (35503734).

Almost surely, 2^648311712 is an apocalyptic number.

It is an amenable number.

648311712 is an abundant number, since it is smaller than the sum of its proper divisors (1055867520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648311712 is a wasteful number, since it uses less digits than its factorization.

648311712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9381 (or 9373 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 648311712 is about 25461.9659885092. The cubic root of 648311712 is about 865.4884750336.

The spelling of 648311712 in words is "six hundred forty-eight million, three hundred eleven thousand, seven hundred twelve".