2148782806 has 4 divisors (see below), whose sum is σ = 3223174212. Its totient is φ = 1074391402.

The previous prime is 2148782771. The next prime is 2148782833. The reversal of 2148782806 is 6082878412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2148782806² = 9234535094722467272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537195700 + ... + 537195703.

It is an arithmetic number, because the mean of its divisors is an integer number (805793553).

Almost surely, 2^2148782806 is an apocalyptic number.

2148782806 is a deficient number, since it is larger than the sum of its proper divisors (1074391406).

2148782806 is a wasteful number, since it uses less digits than its factorization.

2148782806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074391405.

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 2148782806 is about 46354.9652788134. The cubic root of 2148782806 is about 1290.4192708024.

The spelling of 2148782806 in words is "two billion, one hundred forty-eight million, seven hundred eighty-two thousand, eight hundred six".