2778364155 has 16 divisors (see below), whose sum is σ = 5080437504. Its totient is φ = 1270109280.

The previous prime is 2778364153. The next prime is 2778364229. The reversal of 2778364155 is 5514638772.

It is not a de Polignac number, because 2778364155 - 2¹ = 2778364153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2778364153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13230201 + ... + 13230410.

It is an arithmetic number, because the mean of its divisors is an integer number (317527344).

Almost surely, 2^2778364155 is an apocalyptic number.

2778364155 is a deficient number, since it is larger than the sum of its proper divisors (2302073349).

2778364155 is a wasteful number, since it uses less digits than its factorization.

2778364155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26460626.

The product of its digits is 1411200, while the sum is 48.

The square root of 2778364155 is about 52710.1902387005. The cubic root of 2778364155 is about 1405.8200158176.

The spelling of 2778364155 in words is "two billion, seven hundred seventy-eight million, three hundred sixty-four thousand, one hundred fifty-five".