2778273851 has 2 divisors, whose sum is σ = 2778273852. Its totient is φ = 2778273850.

The previous prime is 2778273811. The next prime is 2778273919. The reversal of 2778273851 is 1583728772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2778273851 - 2¹⁸ = 2778011707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2778273851.

It is not a weakly prime, because it can be changed into another prime (2778273811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389136925 + 1389136926.

It is an arithmetic number, because the mean of its divisors is an integer number (1389136926).

Almost surely, 2^2778273851 is an apocalyptic number.

2778273851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778273851 is an equidigital number, since it uses as much as digits as its factorization.

2778273851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1317120, while the sum is 50.

The square root of 2778273851 is about 52709.3336231829. Note that the first 3 decimals coincide. The cubic root of 2778273851 is about 1405.8047847273.

The spelling of 2778273851 in words is "two billion, seven hundred seventy-eight million, two hundred seventy-three thousand, eight hundred fifty-one".