655258185560 has 128 divisors (see below), whose sum is σ = 1614212098560. Its totient is φ = 237410611200.

The previous prime is 655258185557. The next prime is 655258185577. The reversal of 655258185560 is 65581852556.

It is a junction number, because it is equal to n+sod(n) for n = 655258185496 and 655258185505.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 154868645 + ... + 154872875.

It is an arithmetic number, because the mean of its divisors is an integer number (12611032020).

Almost surely, 2^655258185560 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 655258185560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807106049280).

655258185560 is an abundant number, since it is smaller than the sum of its proper divisors (958953913000).

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

655258185560 is a wasteful number, since it uses less digits than its factorization.

655258185560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5449 (or 5445 counting only the distinct ones).

The product of its (nonzero) digits is 14400000, while the sum is 56.

The spelling of 655258185560 in words is "six hundred fifty-five billion, two hundred fifty-eight million, one hundred eighty-five thousand, five hundred sixty".