655718449 has 9 divisors (see below), whose sum is σ = 679879083. Its totient is φ = 632390472.

The previous prime is 655718429. The next prime is 655718467. The reversal of 655718449 is 944817556.

It is a happy number.

The square root of 655718449 is 25607.

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

It can be written as a sum of positive squares in only one way, i.e., 343842849 + 311875600 = 18543^2 + 17660^2 .

It is a de Polignac number, because none of the positive numbers 2^k-655718449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655718429) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 742162 + ... + 743044.

Almost surely, 2^655718449 is an apocalyptic number.

655718449 is the 25607-th square number.

655718449 is the 12804-th centered octagonal number.

It is an amenable number.

655718449 is a deficient number, since it is larger than the sum of its proper divisors (24160634).

655718449 is an frugal number, since it uses more digits than its factorization.

655718449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824 (or 912 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 49.

The cubic root of 655718449 is about 868.7719711228.

Multiplying 655718449 by its sum of digits (49), we get a square (32130204001 = 179249²).

It can be divided in two parts, 655 and 718449, that added together give a square (719104 = 848²).

The spelling of 655718449 in words is "six hundred fifty-five million, seven hundred eighteen thousand, four hundred forty-nine".