2178932145 has 16 divisors (see below), whose sum is σ = 3754468032. Its totient is φ = 1072704960.

The previous prime is 2178932099. The next prime is 2178932159. The reversal of 2178932145 is 5412398712.

It is not a de Polignac number, because 2178932145 - 2⁸ = 2178931889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2178932097 and 2178932106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5586811 + ... + 5587200.

It is an arithmetic number, because the mean of its divisors is an integer number (234654252).

Almost surely, 2^2178932145 is an apocalyptic number.

It is an amenable number.

2178932145 is a deficient number, since it is larger than the sum of its proper divisors (1575535887).

2178932145 is a wasteful number, since it uses less digits than its factorization.

2178932145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11174032.

The product of its digits is 120960, while the sum is 42.

The square root of 2178932145 is about 46679.0332483440. The cubic root of 2178932145 is about 1296.4265065477.

The spelling of 2178932145 in words is "two billion, one hundred seventy-eight million, nine hundred thirty-two thousand, one hundred forty-five".