655533122500 has 45 divisors (see below), whose sum is σ = 1433608364881. Its totient is φ = 262197056000.

The previous prime is 655533122483. The next prime is 655533122501. The reversal of 655533122500 is 5221335556.

The square root of 655533122500 is 809650.

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

It can be written as a sum of positive squares in 7 ways, for example, as 103971422916 + 551561699584 = 322446^2 + 742672^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 655533122500.

It is not an unprimeable number, because it can be changed into a prime (655533122501) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 40474404 + ... + 40490596.

Almost surely, 2^655533122500 is an apocalyptic number.

655533122500 is the 809650-th square number.

It is an amenable number.

655533122500 is an abundant number, since it is smaller than the sum of its proper divisors (778075242381).

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

655533122500 is an frugal number, since it uses more digits than its factorization.

655533122500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32410 (or 16200 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 37.

The spelling of 655533122500 in words is "six hundred fifty-five billion, five hundred thirty-three million, one hundred twenty-two thousand, five hundred".