5428721777 has 2 divisors, whose sum is σ = 5428721778. Its totient is φ = 5428721776.

The previous prime is 5428721693. The next prime is 5428721803. The reversal of 5428721777 is 7771278245.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5428595041 + 126736 = 73679^2 + 356^2 .

It is a cyclic number.

It is not a de Polignac number, because 5428721777 - 2⁸ = 5428721521 is a prime.

It is not a weakly prime, because it can be changed into another prime (5428720777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2714360888 + 2714360889.

It is an arithmetic number, because the mean of its divisors is an integer number (2714360889).

Almost surely, 2^5428721777 is an apocalyptic number.

It is an amenable number.

5428721777 is a deficient number, since it is larger than the sum of its proper divisors (1).

5428721777 is an equidigital number, since it uses as much as digits as its factorization.

5428721777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536640, while the sum is 50.

The square root of 5428721777 is about 73679.8600500842. The cubic root of 5428721777 is about 1757.5156253825.

The spelling of 5428721777 in words is "five billion, four hundred twenty-eight million, seven hundred twenty-one thousand, seven hundred seventy-seven".