206864487147 has 4 divisors (see below), whose sum is σ = 275819316200. Its totient is φ = 137909658096.

The previous prime is 206864487113. The next prime is 206864487173. The reversal of 206864487147 is 741784468602.

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

It is not a de Polignac number, because 206864487147 - 2⁸ = 206864486891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206864487107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34477414522 + ... + 34477414527.

It is an arithmetic number, because the mean of its divisors is an integer number (68954829050).

Almost surely, 2^206864487147 is an apocalyptic number.

206864487147 is a deficient number, since it is larger than the sum of its proper divisors (68954829053).

206864487147 is an equidigital number, since it uses as much as digits as its factorization.

206864487147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68954829052.

The product of its (nonzero) digits is 14450688, while the sum is 57.

The spelling of 206864487147 in words is "two hundred six billion, eight hundred sixty-four million, four hundred eighty-seven thousand, one hundred forty-seven".