648729560 has 32 divisors (see below), whose sum is σ = 1506729600. Its totient is φ = 251120640.

The previous prime is 648729553. The next prime is 648729581. The reversal of 648729560 is 65927846.

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, 260345 + ... + 262824.

It is an arithmetic number, because the mean of its divisors is an integer number (47085300).

Almost surely, 2^648729560 is an apocalyptic number.

It is an amenable number.

648729560 is an abundant number, since it is smaller than the sum of its proper divisors (858000040).

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

648729560 is a wasteful number, since it uses less digits than its factorization.

648729560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523211 (or 523207 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 648729560 is about 25470.1700033588. The cubic root of 648729560 is about 865.6743758148.

The spelling of 648729560 in words is "six hundred forty-eight million, seven hundred twenty-nine thousand, five hundred sixty".