2856778903 has 6 divisors (see below), whose sum is σ = 3140095952. Its totient is φ = 2597071620.

The previous prime is 2856778849. The next prime is 2856778949. The reversal of 2856778903 is 3098776582.

It is not a de Polignac number, because 2856778903 - 2⁹ = 2856778391 is a prime.

It is a super-2 number, since 2×2856778903² = 16322371401251766818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856778403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11804751 + ... + 11804992.

Almost surely, 2^2856778903 is an apocalyptic number.

2856778903 is a deficient number, since it is larger than the sum of its proper divisors (283317049).

2856778903 is a wasteful number, since it uses less digits than its factorization.

2856778903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23609765 (or 23609754 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

The square root of 2856778903 is about 53448.8437947913. The cubic root of 2856778903 is about 1418.9231575078.

The spelling of 2856778903 in words is "two billion, eight hundred fifty-six million, seven hundred seventy-eight thousand, nine hundred three".