5128740609 has 4 divisors (see below), whose sum is σ = 6838320816. Its totient is φ = 3419160404.

The previous prime is 5128740587. The next prime is 5128740637. The reversal of 5128740609 is 9060478215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5128740609 - 2¹² = 5128736513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5128740209) 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, 854790099 + ... + 854790104.

It is an arithmetic number, because the mean of its divisors is an integer number (1709580204).

Almost surely, 2^5128740609 is an apocalyptic number.

It is an amenable number.

5128740609 is a deficient number, since it is larger than the sum of its proper divisors (1709580207).

5128740609 is a wasteful number, since it uses less digits than its factorization.

5128740609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709580206.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 5128740609 is about 71615.2260975276. The cubic root of 5128740609 is about 1724.5279793990.

The spelling of 5128740609 in words is "five billion, one hundred twenty-eight million, seven hundred forty thousand, six hundred nine".