2178047854 has 32 divisors (see below), whose sum is σ = 3519331200. Its totient is φ = 1007285760.

The previous prime is 2178047849. The next prime is 2178047857. The reversal of 2178047854 is 4587408712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178047857) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 613324 + ... + 616864.

It is an arithmetic number, because the mean of its divisors is an integer number (109979100).

Almost surely, 2^2178047854 is an apocalyptic number.

2178047854 is a deficient number, since it is larger than the sum of its proper divisors (1341283346).

2178047854 is a wasteful number, since it uses less digits than its factorization.

2178047854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868.

The product of its (nonzero) digits is 501760, while the sum is 46.

The square root of 2178047854 is about 46669.5602507673. The cubic root of 2178047854 is about 1296.2511035923.

The spelling of 2178047854 in words is "two billion, one hundred seventy-eight million, forty-seven thousand, eight hundred fifty-four".