2552778061 has 2 divisors, whose sum is σ = 2552778062. Its totient is φ = 2552778060.

The previous prime is 2552777971. The next prime is 2552778077. The reversal of 2552778061 is 1608772552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1828845225 + 723932836 = 42765^2 + 26906^2 .

It is a cyclic number.

It is not a de Polignac number, because 2552778061 - 2⁷ = 2552777933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2552777999 and 2552778017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2552778161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276389030 + 1276389031.

It is an arithmetic number, because the mean of its divisors is an integer number (1276389031).

Almost surely, 2^2552778061 is an apocalyptic number.

It is an amenable number.

2552778061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2552778061 is an equidigital number, since it uses as much as digits as its factorization.

2552778061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 2552778061 is about 50525.0241068720. The cubic root of 2552778061 is about 1366.6931559873.

The spelling of 2552778061 in words is "two billion, five hundred fifty-two million, seven hundred seventy-eight thousand, sixty-one".