5139128406 has 16 divisors (see below), whose sum is σ = 10359189504. Its totient is φ = 1699554024.

The previous prime is 5139128399. The next prime is 5139128443. The reversal of 5139128406 is 6048219315.

It is a super-2 number, since 2×5139128406² = 52821281546712201672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3371370 + ... + 3372893.

It is an arithmetic number, because the mean of its divisors is an integer number (647449344).

Almost surely, 2^5139128406 is an apocalyptic number.

5139128406 is an abundant number, since it is smaller than the sum of its proper divisors (5220061098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5139128406 is a wasteful number, since it uses less digits than its factorization.

5139128406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6744395.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 5139128406 is about 71687.7144704726. The cubic root of 5139128406 is about 1725.6914856801.

Subtracting 5139128406 from its reverse (6048219315), we obtain a palindrome (909090909).

It can be divided in two parts, 51391 and 28406, that added together give a palindrome (79797).

The spelling of 5139128406 in words is "five billion, one hundred thirty-nine million, one hundred twenty-eight thousand, four hundred six".