656480755225 has 27 divisors (see below), whose sum is σ = 820961258781. Its totient is φ = 520754239200.

The previous prime is 656480755223. The next prime is 656480755237. The reversal of 656480755225 is 522557084656.

The square root of 656480755225 is 810235.

It is a perfect power (a square), and thus also a powerful number.

656480755225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10360593369 + 646120161856 = 101787^2 + 803816^2 .

It is not a de Polignac number, because 656480755225 - 2¹ = 656480755223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656480755223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 530703307 + ... + 530704543.

Almost surely, 2^656480755225 is an apocalyptic number.

656480755225 is the 810235-th square number.

656480755225 is the 405118-th centered octagonal number.

It is an amenable number.

656480755225 is a deficient number, since it is larger than the sum of its proper divisors (164480503556).

656480755225 is an frugal number, since it uses more digits than its factorization.

656480755225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746 (or 1373 counting only the distinct ones).

The product of its (nonzero) digits is 20160000, while the sum is 55.

The spelling of 656480755225 in words is "six hundred fifty-six billion, four hundred eighty million, seven hundred fifty-five thousand, two hundred twenty-five".