655961831424 has 144 divisors (see below), whose sum is σ = 1896164688600. Its totient is φ = 218466238464.

The previous prime is 655961831299. The next prime is 655961831431. The reversal of 655961831424 is 424138169556.

655961831424 is a `hidden beast` number, since 6 + 5 + 5 + 9 + 618 + 3 + 14 + 2 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22343347 + ... + 22372685.

Almost surely, 2^655961831424 is an apocalyptic number.

655961831424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655961831424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948082344300).

655961831424 is an abundant number, since it is smaller than the sum of its proper divisors (1240202857176).

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

655961831424 is a wasteful number, since it uses less digits than its factorization.

655961831424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30580 (or 30557 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 655961831424 in words is "six hundred fifty-five billion, nine hundred sixty-one million, eight hundred thirty-one thousand, four hundred twenty-four".