655907648 has 56 divisors (see below), whose sum is σ = 1446763680. Its totient is φ = 292497920.

The previous prime is 655907611. The next prime is 655907653. The reversal of 655907648 is 846709556.

It is a junction number, because it is equal to n+sod(n) for n = 655907596 and 655907605.

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, 28523 + ... + 46101.

Almost surely, 2^655907648 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 655907648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (723381840).

655907648 is an abundant number, since it is smaller than the sum of its proper divisors (790856032).

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

655907648 is a wasteful number, since it uses less digits than its factorization.

655907648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17655 (or 17645 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 50.

The square root of 655907648 is about 25610.6940163675. The cubic root of 655907648 is about 868.8555206920.

The spelling of 655907648 in words is "six hundred fifty-five million, nine hundred seven thousand, six hundred forty-eight".