206709424999 has 16 divisors (see below), whose sum is σ = 271279630080. Its totient is φ = 152594789760.

The previous prime is 206709424993. The next prime is 206709425009. The reversal of 206709424999 is 999424907602.

It is not a de Polignac number, because 206709424999 - 2³ = 206709424991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206709424991) 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 15 ways as a sum of consecutive naturals, for example, 70644274 + ... + 70647199.

It is an arithmetic number, because the mean of its divisors is an integer number (16954976880).

Almost surely, 2^206709424999 is an apocalyptic number.

206709424999 is a deficient number, since it is larger than the sum of its proper divisors (64570205081).

206709424999 is a wasteful number, since it uses less digits than its factorization.

206709424999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141291510.

The product of its (nonzero) digits is 17635968, while the sum is 61.

The spelling of 206709424999 in words is "two hundred six billion, seven hundred nine million, four hundred twenty-four thousand, nine hundred ninety-nine".