2550556806 has 64 divisors (see below), whose sum is σ = 6032326656. Its totient is φ = 703533600.

The previous prime is 2550556793. The next prime is 2550556807. The reversal of 2550556806 is 6086550552.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2550556807) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 600711 + ... + 604941.

It is an arithmetic number, because the mean of its divisors is an integer number (94255104).

Almost surely, 2^2550556806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2550556806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3016163328).

2550556806 is an abundant number, since it is smaller than the sum of its proper divisors (3481769850).

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

2550556806 is a wasteful number, since it uses less digits than its factorization.

2550556806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4737.

The product of its (nonzero) digits is 360000, while the sum is 42.

The square root of 2550556806 is about 50503.0375918122. The cubic root of 2550556806 is about 1366.2966396082.

The spelling of 2550556806 in words is "two billion, five hundred fifty million, five hundred fifty-six thousand, eight hundred six".