2778791201 has 2 divisors, whose sum is σ = 2778791202. Its totient is φ = 2778791200.

The previous prime is 2778791189. The next prime is 2778791227. The reversal of 2778791201 is 1021978772.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2502400576 + 276390625 = 50024^2 + 16625^2 .

It is a cyclic number.

It is not a de Polignac number, because 2778791201 - 2¹⁰ = 2778790177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2778797201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389395600 + 1389395601.

It is an arithmetic number, because the mean of its divisors is an integer number (1389395601).

Almost surely, 2^2778791201 is an apocalyptic number.

It is an amenable number.

2778791201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778791201 is an equidigital number, since it uses as much as digits as its factorization.

2778791201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 44.

The square root of 2778791201 is about 52714.2409695900. The cubic root of 2778791201 is about 1405.8920389009.

The spelling of 2778791201 in words is "two billion, seven hundred seventy-eight million, seven hundred ninety-one thousand, two hundred one".