5478988777 has 2 divisors, whose sum is σ = 5478988778. Its totient is φ = 5478988776.

The previous prime is 5478988733. The next prime is 5478988787. The reversal of 5478988777 is 7778898745.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4246346896 + 1232641881 = 65164^2 + 35109^2 .

It is a cyclic number.

It is not a de Polignac number, because 5478988777 - 2⁷ = 5478988649 is a prime.

It is not a weakly prime, because it can be changed into another prime (5478988787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2739494388 + 2739494389.

It is an arithmetic number, because the mean of its divisors is an integer number (2739494389).

Almost surely, 2^5478988777 is an apocalyptic number.

It is an amenable number.

5478988777 is a deficient number, since it is larger than the sum of its proper divisors (1).

5478988777 is an equidigital number, since it uses as much as digits as its factorization.

5478988777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221276160, while the sum is 70.

The square root of 5478988777 is about 74020.1916844316. The cubic root of 5478988777 is about 1762.9235132816.

The spelling of 5478988777 in words is "five billion, four hundred seventy-eight million, nine hundred eighty-eight thousand, seven hundred seventy-seven".