655557808896 has 288 divisors, whose sum is σ = 1970579520000. Its totient is φ = 214929469440.

The previous prime is 655557808879. The next prime is 655557808921. The reversal of 655557808896 is 698808755556.

655557808896 is a `hidden beast` number, since 65 + 5 + 557 + 8 + 0 + 8 + 8 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244883910 + ... + 244886586.

It is an arithmetic number, because the mean of its divisors is an integer number (6842290000).

Almost surely, 2^655557808896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655557808896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (985289760000).

655557808896 is an abundant number, since it is smaller than the sum of its proper divisors (1315021711104).

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

655557808896 is a wasteful number, since it uses less digits than its factorization.

655557808896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272 (or 3252 counting only the distinct ones).

The product of its (nonzero) digits is 725760000, while the sum is 72.

The spelling of 655557808896 in words is "six hundred fifty-five billion, five hundred fifty-seven million, eight hundred eight thousand, eight hundred ninety-six".