2688138417 has 4 divisors (see below), whose sum is σ = 3584184560. Its totient is φ = 1792092276.

The previous prime is 2688138389. The next prime is 2688138443. The reversal of 2688138417 is 7148318862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2688138417 - 2¹¹ = 2688136369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2688138917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448023067 + ... + 448023072.

It is an arithmetic number, because the mean of its divisors is an integer number (896046140).

Almost surely, 2^2688138417 is an apocalyptic number.

It is an amenable number.

2688138417 is a deficient number, since it is larger than the sum of its proper divisors (896046143).

2688138417 is an equidigital number, since it uses as much as digits as its factorization.

2688138417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896046142.

The product of its digits is 516096, while the sum is 48.

The square root of 2688138417 is about 51847.2604580030. The cubic root of 2688138417 is about 1390.4345236749.

The spelling of 2688138417 in words is "two billion, six hundred eighty-eight million, one hundred thirty-eight thousand, four hundred seventeen".