5128401109 has 4 divisors (see below), whose sum is σ = 5522893516. Its totient is φ = 4733908704.

The previous prime is 5128401107. The next prime is 5128401133. The reversal of 5128401109 is 9011048215.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 246584209 + 4881816900 = 15703^2 + 69870^2 .

It is a cyclic number.

It is not a de Polignac number, because 5128401109 - 2¹ = 5128401107 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 (5128401107) 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, 197246184 + ... + 197246209.

It is an arithmetic number, because the mean of its divisors is an integer number (1380723379).

Almost surely, 2^5128401109 is an apocalyptic number.

It is an amenable number.

5128401109 is a deficient number, since it is larger than the sum of its proper divisors (394492407).

5128401109 is a wasteful number, since it uses less digits than its factorization.

5128401109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394492406.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 5128401109 is about 71612.8557523019. The cubic root of 5128401109 is about 1724.4899265115.

The spelling of 5128401109 in words is "five billion, one hundred twenty-eight million, four hundred one thousand, one hundred nine".