228668545249 has 27 divisors (see below), whose sum is σ = 254139207763. Its totient is φ = 205691849792.

The previous prime is 228668545247. The next prime is 228668545271. The reversal of 228668545249 is 942545866822.

The square root of 228668545249 is 478193.

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., 178029144225 + 50639401024 = 421935^2 + 225032^2 .

It is not a de Polignac number, because 228668545249 - 2¹ = 228668545247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228668545247) 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, 186972852 + ... + 186974074.

Almost surely, 2^228668545249 is an apocalyptic number.

228668545249 is the 478193-rd square number.

228668545249 is the 239097-th centered octagonal number.

It is an amenable number.

228668545249 is a deficient number, since it is larger than the sum of its proper divisors (25470662514).

228668545249 is an frugal number, since it uses more digits than its factorization.

228668545249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526 (or 1263 counting only the distinct ones).

The product of its digits is 66355200, while the sum is 61.

The spelling of 228668545249 in words is "two hundred twenty-eight billion, six hundred sixty-eight million, five hundred forty-five thousand, two hundred forty-nine".