2178954855 has 192 divisors, whose sum is σ = 5065721856. Its totient is φ = 838656000.

The previous prime is 2178954839. The next prime is 2178954893. The reversal of 2178954855 is 5584598712.

2178954855 is a `hidden beast` number, since 2 + 1 + 78 + 95 + 485 + 5 = 666.

It is not a de Polignac number, because 2178954855 - 2⁴ = 2178954839 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4181995 + ... + 4182515.

It is an arithmetic number, because the mean of its divisors is an integer number (26383968).

Almost surely, 2^2178954855 is an apocalyptic number.

2178954855 is an abundant number, since it is smaller than the sum of its proper divisors (2886767001).

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

2178954855 is a wasteful number, since it uses less digits than its factorization.

2178954855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 635 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 54.

The square root of 2178954855 is about 46679.2765046760. The cubic root of 2178954855 is about 1296.4310105496.

The spelling of 2178954855 in words is "two billion, one hundred seventy-eight million, nine hundred fifty-four thousand, eight hundred fifty-five".