2556218208 has 48 divisors (see below), whose sum is σ = 6720670656. Its totient is φ = 850727040.

The previous prime is 2556218173. The next prime is 2556218227. The reversal of 2556218208 is 8028126552.

It is a tau number, because it is divible by the number of its divisors (48).

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, 41023 + ... + 82433.

It is an arithmetic number, because the mean of its divisors is an integer number (140013972).

Almost surely, 2^2556218208 is an apocalyptic number.

It is an amenable number.

2556218208 is an abundant number, since it is smaller than the sum of its proper divisors (4164452448).

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

2556218208 is a wasteful number, since it uses less digits than its factorization.

2556218208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42067 (or 42059 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 39.

The square root of 2556218208 is about 50559.0566367688. The cubic root of 2556218208 is about 1367.3068031387.

The spelling of 2556218208 in words is "two billion, five hundred fifty-six million, two hundred eighteen thousand, two hundred eight".