655633441 has 4 divisors (see below), whose sum is σ = 694200132. Its totient is φ = 617066752.

The previous prime is 655633439. The next prime is 655633457. The reversal of 655633441 is 144336556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 215473041 + 440160400 = 14679^2 + 20980^2 .

It is a cyclic number.

It is not a de Polignac number, because 655633441 - 2¹ = 655633439 is a prime.

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 655633441.

It is not an unprimeable number, because it can be changed into a prime (655633411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19283320 + ... + 19283353.

It is an arithmetic number, because the mean of its divisors is an integer number (173550033).

Almost surely, 2^655633441 is an apocalyptic number.

It is an amenable number.

655633441 is a deficient number, since it is larger than the sum of its proper divisors (38566691).

655633441 is a wasteful number, since it uses less digits than its factorization.

655633441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38566690.

The product of its digits is 129600, while the sum is 37.

The square root of 655633441 is about 25605.3400875677. The cubic root of 655633441 is about 868.7344266760.

Adding to 655633441 its reverse (144336556), we get a palindrome (799969997).

The spelling of 655633441 in words is "six hundred fifty-five million, six hundred thirty-three thousand, four hundred forty-one".