2778789941 has 2 divisors, whose sum is σ = 2778789942. Its totient is φ = 2778789940.

The previous prime is 2778789917. The next prime is 2778789967. The reversal of 2778789941 is 1499878772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1660155025 + 1118634916 = 40745^2 + 33446^2 .

It is a cyclic number.

It is not a de Polignac number, because 2778789941 - 2⁶ = 2778789877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2778789901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389394970 + 1389394971.

It is an arithmetic number, because the mean of its divisors is an integer number (1389394971).

Almost surely, 2^2778789941 is an apocalyptic number.

It is an amenable number.

2778789941 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778789941 is an equidigital number, since it uses as much as digits as its factorization.

2778789941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14224896, while the sum is 62.

The square root of 2778789941 is about 52714.2290183590. The cubic root of 2778789941 is about 1405.8918264075.

The spelling of 2778789941 in words is "two billion, seven hundred seventy-eight million, seven hundred eighty-nine thousand, nine hundred forty-one".