2778311455 has 4 divisors (see below), whose sum is σ = 3333973752. Its totient is φ = 2222649160.

The previous prime is 2778311449. The next prime is 2778311527. The reversal of 2778311455 is 5541138772.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2778311455 - 2¹¹ = 2778309407 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 3 ways as a sum of consecutive naturals, for example, 277831141 + ... + 277831150.

It is an arithmetic number, because the mean of its divisors is an integer number (833493438).

Almost surely, 2^2778311455 is an apocalyptic number.

2778311455 is a deficient number, since it is larger than the sum of its proper divisors (555662297).

2778311455 is an equidigital number, since it uses as much as digits as its factorization.

2778311455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555662296.

The product of its digits is 235200, while the sum is 43.

The square root of 2778311455 is about 52709.6903329929. The cubic root of 2778311455 is about 1405.8111272320.

The spelling of 2778311455 in words is "two billion, seven hundred seventy-eight million, three hundred eleven thousand, four hundred fifty-five".