2147643806 has 16 divisors (see below), whose sum is σ = 4016373120. Its totient is φ = 836744280.

The previous prime is 2147643767. The next prime is 2147643809. The reversal of 2147643806 is 6083467412.

It is a super-2 number, since 2×2147643806² = 9224747834900331272, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147643809) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6972716 + ... + 6973023.

It is an arithmetic number, because the mean of its divisors is an integer number (251023320).

Almost surely, 2^2147643806 is an apocalyptic number.

2147643806 is a deficient number, since it is larger than the sum of its proper divisors (1868729314).

2147643806 is a wasteful number, since it uses less digits than its factorization.

2147643806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13945759.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 2147643806 is about 46342.6780192945. The cubic root of 2147643806 is about 1290.1912273852.

The spelling of 2147643806 in words is "two billion, one hundred forty-seven million, six hundred forty-three thousand, eight hundred six".