206864486443 has 4 divisors (see below), whose sum is σ = 207177443968. Its totient is φ = 206551528920.

The previous prime is 206864486407. The next prime is 206864486459. The reversal of 206864486443 is 344684468602.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 206864486443 - 2⁹ = 206864485931 is a prime.

It is a super-2 number, since 2×206864486443² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206864486743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156477771 + ... + 156479092.

It is an arithmetic number, because the mean of its divisors is an integer number (51794360992).

Almost surely, 2^206864486443 is an apocalyptic number.

206864486443 is a deficient number, since it is larger than the sum of its proper divisors (312957525).

206864486443 is an equidigital number, since it uses as much as digits as its factorization.

206864486443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312957524.

The product of its (nonzero) digits is 21233664, while the sum is 55.

It can be divided in two parts, 20686 and 4486443, that added together give a square (4507129 = 2123²).

The spelling of 206864486443 in words is "two hundred six billion, eight hundred sixty-four million, four hundred eighty-six thousand, four hundred forty-three".