2248209356409 has 9 divisors (see below), whose sum is σ = 3247420012239. Its totient is φ = 1498803238800.

The previous prime is 2248209356377. The next prime is 2248209356431. The reversal of 2248209356409 is 9046539028422.

The square root of 2248209356409 is 1499403.

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

2248209356409 is a `hidden beast` number, since 2 + 2 + 48 + 209 + 356 + 40 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2075319716409 + 172889640000 = 1440597^2 + 415800^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2248209356409 - 2⁵ = 2248209356377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2248209356909) 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, 4248309 + ... + 4748109.

Almost surely, 2^{2248209356409} is an apocalyptic number.

2248209356409 is the 1499403-rd square number.

2248209356409 is the 749702-nd centered octagonal number.

It is an amenable number.

2248209356409 is a deficient number, since it is larger than the sum of its proper divisors (999210655830).

2248209356409 is an frugal number, since it uses more digits than its factorization.

2248209356409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999608 (or 499804 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 2248209356409 in words is "two trillion, two hundred forty-eight billion, two hundred nine million, three hundred fifty-six thousand, four hundred nine".