2825808778 has 36 divisors (see below), whose sum is σ = 4754055618. Its totient is φ = 1259119680.

The previous prime is 2825808761. The next prime is 2825808781. The reversal of 2825808778 is 8778085282.

2825808778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 9 ways, for example, as 349054489 + 2476754289 = 18683^2 + 49767^2 .

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 279288 + ... + 289228.

Almost surely, 2^2825808778 is an apocalyptic number.

2825808778 is a deficient number, since it is larger than the sum of its proper divisors (1928246840).

2825808778 is a wasteful number, since it uses less digits than its factorization.

2825808778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10027 (or 9985 counting only the distinct ones).

The product of its (nonzero) digits is 4014080, while the sum is 55.

The square root of 2825808778 is about 53158.3368626220. The cubic root of 2825808778 is about 1413.7770365200. Note that the first 3 decimals are identical.

The spelling of 2825808778 in words is "two billion, eight hundred twenty-five million, eight hundred eight thousand, seven hundred seventy-eight".