2550779778 has 16 divisors (see below), whose sum is σ = 5239440000. Its totient is φ = 827279856.

The previous prime is 2550779753. The next prime is 2550779801. The reversal of 2550779778 is 8779770552.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5744778 + ... + 5745221.

It is an arithmetic number, because the mean of its divisors is an integer number (327465000).

Almost surely, 2^2550779778 is an apocalyptic number.

2550779778 is an abundant number, since it is smaller than the sum of its proper divisors (2688660222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2550779778 is a wasteful number, since it uses less digits than its factorization.

2550779778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11490041.

The product of its (nonzero) digits is 8643600, while the sum is 57.

The square root of 2550779778 is about 50505.2450543505. The cubic root of 2550779778 is about 1366.3364527471.

The spelling of 2550779778 in words is "two billion, five hundred fifty million, seven hundred seventy-nine thousand, seven hundred seventy-eight".