2569945856 has 18 divisors (see below), whose sum is σ = 5129853372. Its totient is φ = 1284972800.

The previous prime is 2569945831. The next prime is 2569945877. The reversal of 2569945856 is 6585499652.

It is a junction number, because it is equal to n+sod(n) for n = 2569945795 and 2569945804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5019170 + ... + 5019681.

It is an arithmetic number, because the mean of its divisors is an integer number (284991854).

Almost surely, 2^2569945856 is an apocalyptic number.

It is an amenable number.

2569945856 is a deficient number, since it is larger than the sum of its proper divisors (2559907516).

2569945856 is an equidigital number, since it uses as much as digits as its factorization.

2569945856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10038867 (or 10038853 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 59.

The square root of 2569945856 is about 50694.6334043358. The cubic root of 2569945856 is about 1369.7500487045.

The spelling of 2569945856 in words is "two billion, five hundred sixty-nine million, nine hundred forty-five thousand, eight hundred fifty-six".