5128025649 has 16 divisors (see below), whose sum is σ = 6857299200. Its totient is φ = 3408734736.

The previous prime is 5128025647. The next prime is 5128025657. The reversal of 5128025649 is 9465208215.

It is not a de Polignac number, because 5128025649 - 2¹ = 5128025647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5128025649.

It is not an unprimeable number, because it can be changed into a prime (5128025647) 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 15 ways as a sum of consecutive naturals, for example, 2084182 + ... + 2086640.

It is an arithmetic number, because the mean of its divisors is an integer number (428581200).

Almost surely, 2^5128025649 is an apocalyptic number.

It is an amenable number.

5128025649 is a deficient number, since it is larger than the sum of its proper divisors (1729273551).

5128025649 is a wasteful number, since it uses less digits than its factorization.

5128025649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 5128025649 is about 71610.2342476269. The cubic root of 5128025649 is about 1724.4478410885.

The spelling of 5128025649 in words is "five billion, one hundred twenty-eight million, twenty-five thousand, six hundred forty-nine".