5138749442 has 18 divisors (see below), whose sum is σ = 7779488187. Its totient is φ = 2545804336.

The previous prime is 5138749433. The next prime is 5138749457. The reversal of 5138749442 is 2449478315.

It can be written as a sum of positive squares in 5 ways, for example, as 4834281841 + 304467601 = 69529^2 + 17449^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=50689.

It is a super-2 number, since 2×5138749442² = 52813491655310622728, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17538248 + ... + 17538540.

Almost surely, 2^5138749442 is an apocalyptic number.

5138749442 is a deficient number, since it is larger than the sum of its proper divisors (2640738745).

5138749442 is an frugal number, since it uses more digits than its factorization.

5138749442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934 (or 468 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The square root of 5138749442 is about 71685.0712631298. The cubic root of 5138749442 is about 1725.6490666178.

The spelling of 5138749442 in words is "five billion, one hundred thirty-eight million, seven hundred forty-nine thousand, four hundred forty-two".