655204601056020 has 192 divisors, whose sum is σ = 1902947020128000. Its totient is φ = 168242200182784.

The previous prime is 655204601056009. The next prime is 655204601056063. The reversal of 655204601056020 is 20650106402556.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1779639316 + ... + 1780007444.

It is an arithmetic number, because the mean of its divisors is an integer number (9911182396500).

Almost surely, 2^{655204601056020} is an apocalyptic number.

655204601056020 is a gapful number since it is divisible by the number (60) 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 655204601056020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (951473510064000).

655204601056020 is an abundant number, since it is smaller than the sum of its proper divisors (1247742419071980).

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

655204601056020 is a wasteful number, since it uses less digits than its factorization.

655204601056020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370922 (or 370920 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

Adding to 655204601056020 its reverse (20650106402556), we get a palindrome (675854707458576).

The spelling of 655204601056020 in words is "six hundred fifty-five trillion, two hundred four billion, six hundred one million, fifty-six thousand, twenty".