648353660 has 24 divisors (see below), whose sum is σ = 1374271920. Its totient is φ = 256916864.

The previous prime is 648353621. The next prime is 648353677. The reversal of 648353660 is 66353846.

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, 149345 + ... + 153624.

It is an arithmetic number, because the mean of its divisors is an integer number (57261330).

Almost surely, 2^648353660 is an apocalyptic number.

It is an amenable number.

648353660 is an abundant number, since it is smaller than the sum of its proper divisors (725918260).

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

648353660 is a wasteful number, since it uses less digits than its factorization.

648353660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303085 (or 303083 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The square root of 648353660 is about 25462.7897136194. The cubic root of 648353660 is about 865.5071413258.

The spelling of 648353660 in words is "six hundred forty-eight million, three hundred fifty-three thousand, six hundred sixty".