5139128445 has 32 divisors (see below), whose sum is σ = 9178735104. Its totient is φ = 2433748800.

The previous prime is 5139128443. The next prime is 5139128479. The reversal of 5139128445 is 5448219315.

It is not a de Polignac number, because 5139128445 - 2¹ = 5139128443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5139128397 and 5139128406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5139128443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355071 + ... + 369260.

It is an arithmetic number, because the mean of its divisors is an integer number (286835472).

Almost surely, 2^5139128445 is an apocalyptic number.

5139128445 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5139128445 is a deficient number, since it is larger than the sum of its proper divisors (4039606659).

5139128445 is a wasteful number, since it uses less digits than its factorization.

5139128445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724393.

The product of its digits is 172800, while the sum is 42.

The square root of 5139128445 is about 71687.7147424857. The cubic root of 5139128445 is about 1725.6914900454.

The spelling of 5139128445 in words is "five billion, one hundred thirty-nine million, one hundred twenty-eight thousand, four hundred forty-five".