2778731255 has 8 divisors (see below), whose sum is σ = 3338886912. Its totient is φ = 2220045408.

The previous prime is 2778731183. The next prime is 2778731261. The reversal of 2778731255 is 5521378772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2778731255 - 2¹⁰ = 2778730231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363287 + ... + 370856.

It is an arithmetic number, because the mean of its divisors is an integer number (417360864).

Almost surely, 2^2778731255 is an apocalyptic number.

2778731255 is a deficient number, since it is larger than the sum of its proper divisors (560155657).

2778731255 is an equidigital number, since it uses as much as digits as its factorization.

2778731255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734905.

The product of its digits is 823200, while the sum is 47.

The square root of 2778731255 is about 52713.6723725449. The cubic root of 2778731255 is about 1405.8819292040.

The spelling of 2778731255 in words is "two billion, seven hundred seventy-eight million, seven hundred thirty-one thousand, two hundred fifty-five".