655571505056 has 96 divisors (see below), whose sum is σ = 1469485382400. Its totient is φ = 285394129920.

The previous prime is 655571505049. The next prime is 655571505059. The reversal of 655571505056 is 650505175556.

It is a junction number, because it is equal to n+sod(n) for n = 655571504995 and 655571505013.

It is not an unprimeable number, because it can be changed into a prime (655571505059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1628921 + ... + 1991111.

It is an arithmetic number, because the mean of its divisors is an integer number (15307139400).

Almost surely, 2^655571505056 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 655571505056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734742691200).

655571505056 is an abundant number, since it is smaller than the sum of its proper divisors (813913877344).

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

655571505056 is a wasteful number, since it uses less digits than its factorization.

655571505056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362462 (or 362454 counting only the distinct ones).

The product of its (nonzero) digits is 3937500, while the sum is 50.

The spelling of 655571505056 in words is "six hundred fifty-five billion, five hundred seventy-one million, five hundred five thousand, fifty-six".