2638888888889 has 8 divisors (see below), whose sum is σ = 2878866567360. Its totient is φ = 2398924325200.

The previous prime is 2638888888879. The next prime is 2638888888897. The reversal of 2638888888889 is 9888888888362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2638888888889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2638888888798 and 2638888888807.

It is not an unprimeable number, because it can be changed into a prime (2638888888879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2855594 + ... + 3664995.

It is an arithmetic number, because the mean of its divisors is an integer number (359858320920).

Almost surely, 2^{2638888888889} is an apocalyptic number.

It is an amenable number.

2638888888889 is a deficient number, since it is larger than the sum of its proper divisors (239977678471).

2638888888889 is a wasteful number, since it uses less digits than its factorization.

2638888888889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6557391.

The product of its digits is 43486543872, while the sum is 92.

It can be divided in two parts, 26388888 and 88889, that multiplied together give a palindrome (2345681865432).

The spelling of 2638888888889 in words is "two trillion, six hundred thirty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-nine".