5128551899 has 2 divisors, whose sum is σ = 5128551900. Its totient is φ = 5128551898.

The previous prime is 5128551889. The next prime is 5128551913. The reversal of 5128551899 is 9981558215.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5128551899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5128551899.

It is not a weakly prime, because it can be changed into another prime (5128551809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2564275949 + 2564275950.

It is an arithmetic number, because the mean of its divisors is an integer number (2564275950).

Almost surely, 2^5128551899 is an apocalyptic number.

5128551899 is a deficient number, since it is larger than the sum of its proper divisors (1).

5128551899 is an equidigital number, since it uses as much as digits as its factorization.

5128551899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296000, while the sum is 53.

The square root of 5128551899 is about 71613.9085583241. The cubic root of 5128551899 is about 1724.5068280293.

The spelling of 5128551899 in words is "five billion, one hundred twenty-eight million, five hundred fifty-one thousand, eight hundred ninety-nine".