5138889252769 has 4 divisors (see below), whose sum is σ = 5151704438340. Its totient is φ = 5126074067200.

The previous prime is 5138889252689. The next prime is 5138889252779. The reversal of 5138889252769 is 9672529888315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2473033017744 + 2665856235025 = 1572588^2 + 1632745^2 .

It is a cyclic number.

It is not a de Polignac number, because 5138889252769 - 2⁹ = 5138889252257 is a prime.

It is a super-2 number, since 2×5138889252769² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5138889252779) 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, 6407592184 + ... + 6407592985.

It is an arithmetic number, because the mean of its divisors is an integer number (1287926109585).

Almost surely, 2^{5138889252769} is an apocalyptic number.

It is an amenable number.

5138889252769 is a deficient number, since it is larger than the sum of its proper divisors (12815185571).

5138889252769 is a wasteful number, since it uses less digits than its factorization.

5138889252769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12815185570.

The product of its digits is 522547200, while the sum is 73.

The spelling of 5138889252769 in words is "five trillion, one hundred thirty-eight billion, eight hundred eighty-nine million, two hundred fifty-two thousand, seven hundred sixty-nine".