656641460 has 24 divisors (see below), whose sum is σ = 1379675976. Its totient is φ = 262517760.

The previous prime is 656641459. The next prime is 656641471. The reversal of 656641460 is 64146656.

656641460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 281367076 + 375274384 = 16774^2 + 19372^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

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, 35624 + ... + 50816.

It is an arithmetic number, because the mean of its divisors is an integer number (57486499).

Almost surely, 2^656641460 is an apocalyptic number.

It is an amenable number.

656641460 is an abundant number, since it is smaller than the sum of its proper divisors (723034516).

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

656641460 is a wasteful number, since it uses less digits than its factorization.

656641460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17363 (or 17361 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 656641460 is about 25625.0162926777. The cubic root of 656641460 is about 869.1794174016.

The spelling of 656641460 in words is "six hundred fifty-six million, six hundred forty-one thousand, four hundred sixty".