5128709691 has 32 divisors (see below), whose sum is σ = 8265625600. Its totient is φ = 2763240480.

The previous prime is 5128709683. The next prime is 5128709713. The reversal of 5128709691 is 1969078215.

It is not a de Polignac number, because 5128709691 - 2³ = 5128709683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5128709691.

It is not an unprimeable number, because it can be changed into a prime (5128709491) 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, 53730 + ... + 114648.

It is an arithmetic number, because the mean of its divisors is an integer number (258300800).

Almost surely, 2^5128709691 is an apocalyptic number.

5128709691 is a deficient number, since it is larger than the sum of its proper divisors (3136915909).

5128709691 is a wasteful number, since it uses less digits than its factorization.

5128709691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61159.

The product of its (nonzero) digits is 272160, while the sum is 48.

The square root of 5128709691 is about 71615.0102352852. The cubic root of 5128709691 is about 1724.5245140217.

The spelling of 5128709691 in words is "five billion, one hundred twenty-eight million, seven hundred nine thousand, six hundred ninety-one".