2778754155 has 16 divisors (see below), whose sum is σ = 4487560704. Its totient is φ = 1468150880.

The previous prime is 2778754067. The next prime is 2778754169. The reversal of 2778754155 is 5514578772.

It is not a de Polignac number, because 2778754155 - 2⁸ = 2778753899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2778754098 and 2778754107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864051 + ... + 867260.

It is an arithmetic number, because the mean of its divisors is an integer number (280472544).

Almost surely, 2^2778754155 is an apocalyptic number.

2778754155 is a deficient number, since it is larger than the sum of its proper divisors (1708806549).

2778754155 is a wasteful number, since it uses less digits than its factorization.

2778754155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731426.

The product of its digits is 2744000, while the sum is 51.

The square root of 2778754155 is about 52713.8895832967. The cubic root of 2778754155 is about 1405.8857912313.

The spelling of 2778754155 in words is "two billion, seven hundred seventy-eight million, seven hundred fifty-four thousand, one hundred fifty-five".