2438135471209 has 3 divisors (see below), whose sum is σ = 2438137032663. Its totient is φ = 2438133909756.

The previous prime is 2438135471207. The next prime is 2438135471237. The reversal of 2438135471209 is 9021745318342.

The square root of 2438135471209 is 1561453.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1776795691225 + 661339779984 = 1332965^2 + 813228^2 .

It is not a de Polignac number, because 2438135471209 - 2¹ = 2438135471207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2438135471207) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 780727 + ... + 2342179.

It is an arithmetic number, because the mean of its divisors is an integer number (812712344221).

Almost surely, 2^{2438135471209} is an apocalyptic number.

2438135471209 is the 1561453-rd square number.

2438135471209 is the 780727-th centered octagonal number.

It is an amenable number.

2438135471209 is a deficient number, since it is larger than the sum of its proper divisors (1561454).

2438135471209 is an frugal number, since it uses more digits than its factorization.

2438135471209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122906 (or 1561453 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

Multiplying 2438135471209 by its sum of digits (49), we get a square (119468638089241 = 10930171²).

The spelling of 2438135471209 in words is "two trillion, four hundred thirty-eight billion, one hundred thirty-five million, four hundred seventy-one thousand, two hundred nine".