2778228920903 has 4 divisors (see below), whose sum is σ = 2778233760120. Its totient is φ = 2778224081688.

The previous prime is 2778228920851. The next prime is 2778228920933. The reversal of 2778228920903 is 3090298228772.

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

It is a cyclic number.

It is not a de Polignac number, because 2778228920903 - 2³⁰ = 2777155179079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778228920933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1421093 + ... + 2752446.

It is an arithmetic number, because the mean of its divisors is an integer number (694558440030).

Almost surely, 2^{2778228920903} is an apocalyptic number.

2778228920903 is a deficient number, since it is larger than the sum of its proper divisors (4839217).

2778228920903 is an equidigital number, since it uses as much as digits as its factorization.

2778228920903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4839216.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 2778228920903 in words is "two trillion, seven hundred seventy-eight billion, two hundred twenty-eight million, nine hundred twenty thousand, nine hundred three".