2778875155 has 8 divisors (see below), whose sum is σ = 3811028832. Its totient is φ = 1905514368.

The previous prime is 2778875147. The next prime is 2778875167. The reversal of 2778875155 is 5515788772.

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 2778875155 - 2³ = 2778875147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2778875096 and 2778875105.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 39698182 + ... + 39698251.

It is an arithmetic number, because the mean of its divisors is an integer number (476378604).

Almost surely, 2^2778875155 is an apocalyptic number.

2778875155 is a deficient number, since it is larger than the sum of its proper divisors (1032153677).

2778875155 is an equidigital number, since it uses as much as digits as its factorization.

2778875155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79396445.

The product of its digits is 5488000, while the sum is 55.

The square root of 2778875155 is about 52715.0372759045. The cubic root of 2778875155 is about 1405.9061972241.

The spelling of 2778875155 in words is "two billion, seven hundred seventy-eight million, eight hundred seventy-five thousand, one hundred fifty-five".