648109764 has 27 divisors (see below), whose sum is σ = 1638663663. Its totient is φ = 215985672.

The previous prime is 648109747. The next prime is 648109769. The reversal of 648109764 is 467901846.

The square root of 648109764 is 25458.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (648109769) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 150627 + ... + 154869.

Almost surely, 2^648109764 is an apocalyptic number.

648109764 is the 25458-th square number.

It is an amenable number.

648109764 is an abundant number, since it is smaller than the sum of its proper divisors (990553899).

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

648109764 is an equidigital number, since it uses as much as digits as its factorization.

648109764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8496 (or 4248 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The cubic root of 648109764 is about 865.3985996364.

The spelling of 648109764 in words is "six hundred forty-eight million, one hundred nine thousand, seven hundred sixty-four".