5128887637 has 4 divisors (see below), whose sum is σ = 5142638380. Its totient is φ = 5115136896.

The previous prime is 5128887623. The next prime is 5128887649. The reversal of 5128887637 is 7367888215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7367888215 = 5 ⋅1473577643.

It can be written as a sum of positive squares in 2 ways, for example, as 4137834276 + 991053361 = 64326^2 + 31481^2 .

It is a cyclic number.

It is not a de Polignac number, because 5128887637 - 2¹⁵ = 5128854869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5128887667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6874812 + ... + 6875557.

It is an arithmetic number, because the mean of its divisors is an integer number (1285659595).

Almost surely, 2^5128887637 is an apocalyptic number.

It is an amenable number.

5128887637 is a deficient number, since it is larger than the sum of its proper divisors (13750743).

5128887637 is a wasteful number, since it uses less digits than its factorization.

5128887637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13750742.

The product of its digits is 4515840, while the sum is 55.

The square root of 5128887637 is about 71616.2526037212. The cubic root of 5128887637 is about 1724.5444585243.

The spelling of 5128887637 in words is "five billion, one hundred twenty-eight million, eight hundred eighty-seven thousand, six hundred thirty-seven".