2555605806 has 16 divisors (see below), whose sum is σ = 5504381904. Its totient is φ = 786340224.

The previous prime is 2555605783. The next prime is 2555605841. The reversal of 2555605806 is 6085065552.

2555605806 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2555605806² = 13062242071321819272, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16382011 + ... + 16382166.

It is an arithmetic number, because the mean of its divisors is an integer number (344023869).

Almost surely, 2^2555605806 is an apocalyptic number.

2555605806 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2555605806 is an abundant number, since it is smaller than the sum of its proper divisors (2948776098).

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

2555605806 is a wasteful number, since it uses less digits than its factorization.

2555605806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32764195.

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

The square root of 2555605806 is about 50552.9999703282. Note that the first 4 decimals coincide. The cubic root of 2555605806 is about 1367.1976042846.

The spelling of 2555605806 in words is "two billion, five hundred fifty-five million, six hundred five thousand, eight hundred six".