648531049328 has 40 divisors (see below), whose sum is σ = 1300916289600. Its totient is φ = 312828932864.

The previous prime is 648531049273. The next prime is 648531049333. The reversal of 648531049328 is 823940135846.

It is a self number, because there is not a number n which added to its sum of digits gives 648531049328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1625 + ... + 1138887.

It is an arithmetic number, because the mean of its divisors is an integer number (32522907240).

Almost surely, 2^648531049328 is an apocalyptic number.

It is an amenable number.

648531049328 is an abundant number, since it is smaller than the sum of its proper divisors (652385240272).

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

648531049328 is a wasteful number, since it uses less digits than its factorization.

648531049328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138529 (or 1138523 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 648531049328 in words is "six hundred forty-eight billion, five hundred thirty-one million, forty-nine thousand, three hundred twenty-eight".