655711681168 has 20 divisors (see below), whose sum is σ = 1274081626300. Its totient is φ = 326916422784.

The previous prime is 655711681133. The next prime is 655711681193. The reversal of 655711681168 is 861186117556.

It can be written as a sum of positive squares in 2 ways, for example, as 491501949184 + 164209731984 = 701072^2 + 405228^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58707855 + ... + 58719022.

It is an arithmetic number, because the mean of its divisors is an integer number (63704081315).

Almost surely, 2^655711681168 is an apocalyptic number.

It is an amenable number.

655711681168 is a deficient number, since it is larger than the sum of its proper divisors (618369945132).

655711681168 is a wasteful number, since it uses less digits than its factorization.

655711681168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117427234 (or 117427228 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 55.

The spelling of 655711681168 in words is "six hundred fifty-five billion, seven hundred eleven million, six hundred eighty-one thousand, one hundred sixty-eight".