2158183478 has 32 divisors (see below), whose sum is σ = 3558677760. Its totient is φ = 973496160.

The previous prime is 2158183441. The next prime is 2158183481. The reversal of 2158183478 is 8743818512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2231351 + ... + 2232317.

It is an arithmetic number, because the mean of its divisors is an integer number (111208680).

Almost surely, 2^2158183478 is an apocalyptic number.

2158183478 is a deficient number, since it is larger than the sum of its proper divisors (1400494282).

2158183478 is a wasteful number, since it uses less digits than its factorization.

2158183478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652.

The product of its digits is 430080, while the sum is 47.

The square root of 2158183478 is about 46456.2533788509. The cubic root of 2158183478 is about 1292.2983440554.

The spelling of 2158183478 in words is "two billion, one hundred fifty-eight million, one hundred eighty-three thousand, four hundred seventy-eight".