655568747584 has 21 divisors (see below), whose sum is σ = 1300907087157. Its totient is φ = 327781135104.

The previous prime is 655568747539. The next prime is 655568747599. The reversal of 655568747584 is 485747865556.

The square root of 655568747584 is 809672.

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

It can be written as a sum of positive squares in only one way, i.e., 139929861184 + 515638886400 = 374072^2 + 718080^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6426772 + ... + 6527980.

Almost surely, 2^655568747584 is an apocalyptic number.

655568747584 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

655568747584 is the 809672-nd square number.

It is an amenable number.

655568747584 is a deficient number, since it is larger than the sum of its proper divisors (645338339573).

655568747584 is an frugal number, since it uses more digits than its factorization.

655568747584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202430 (or 101211 counting only the distinct ones).

The product of its digits is 1128960000, while the sum is 70.

The spelling of 655568747584 in words is "six hundred fifty-five billion, five hundred sixty-eight million, seven hundred forty-seven thousand, five hundred eighty-four".