2163198078 has 24 divisors (see below), whose sum is σ = 4688470800. Its totient is φ = 720828864.

The previous prime is 2163198029. The next prime is 2163198083. The reversal of 2163198078 is 8708913612.

2163198078 is a `hidden beast` number, since 2 + 1 + 631 + 9 + 8 + 0 + 7 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41638 + ... + 77846.

It is an arithmetic number, because the mean of its divisors is an integer number (195352950).

Almost surely, 2^2163198078 is an apocalyptic number.

2163198078 is an abundant number, since it is smaller than the sum of its proper divisors (2525272722).

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

2163198078 is a wasteful number, since it uses less digits than its factorization.

2163198078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39536 (or 39533 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 2163198078 is about 46510.1932698629. The cubic root of 2163198078 is about 1293.2984670310.

The spelling of 2163198078 in words is "two billion, one hundred sixty-three million, one hundred ninety-eight thousand, seventy-eight".