648306329972 has 72 divisors (see below), whose sum is σ = 1396281348000. Its totient is φ = 261885669696.

The previous prime is 648306329971. The next prime is 648306329977. The reversal of 648306329972 is 279923603846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648306329971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291779 + ... + 1175477.

It is an arithmetic number, because the mean of its divisors is an integer number (19392796500).

Almost surely, 2^648306329972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648306329972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698140674000).

648306329972 is an abundant number, since it is smaller than the sum of its proper divisors (747975018028).

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

648306329972 is a wasteful number, since it uses less digits than its factorization.

648306329972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883933 (or 883924 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 59.

The spelling of 648306329972 in words is "six hundred forty-eight billion, three hundred six million, three hundred twenty-nine thousand, nine hundred seventy-two".