2778285541 has 2 divisors, whose sum is σ = 2778285542. Its totient is φ = 2778285540.

The previous prime is 2778285539. The next prime is 2778285553. The reversal of 2778285541 is 1455828772.

It is a happy number.

2778285541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2588672641 + 189612900 = 50879^2 + 13770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2778285541 - 2¹ = 2778285539 is a prime.

Together with 2778285539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2778285511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389142770 + 1389142771.

It is an arithmetic number, because the mean of its divisors is an integer number (1389142771).

Almost surely, 2^2778285541 is an apocalyptic number.

It is an amenable number.

2778285541 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778285541 is an equidigital number, since it uses as much as digits as its factorization.

2778285541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1254400, while the sum is 49.

The square root of 2778285541 is about 52709.4445142424. Note that the first 3 decimals coincide. The cubic root of 2778285541 is about 1405.8067564354.

The spelling of 2778285541 in words is "two billion, seven hundred seventy-eight million, two hundred eighty-five thousand, five hundred forty-one".