2178749471 has 16 divisors (see below), whose sum is σ = 2314518528. Its totient is φ = 2047550400.

The previous prime is 2178749431. The next prime is 2178749473. The reversal of 2178749471 is 1749478712.

It is a cyclic number.

It is not a de Polignac number, because 2178749471 - 2¹⁰ = 2178748447 is a prime.

It is a super-3 number, since 3×2178749471³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178749473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279590 + ... + 287276.

It is an arithmetic number, because the mean of its divisors is an integer number (144657408).

Almost surely, 2^2178749471 is an apocalyptic number.

2178749471 is a deficient number, since it is larger than the sum of its proper divisors (135769057).

2178749471 is a wasteful number, since it uses less digits than its factorization.

2178749471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7982.

The product of its digits is 790272, while the sum is 50.

The square root of 2178749471 is about 46677.0765044256. The cubic root of 2178749471 is about 1296.3902762571.

The spelling of 2178749471 in words is "two billion, one hundred seventy-eight million, seven hundred forty-nine thousand, four hundred seventy-one".