206146609809 has 32 divisors (see below), whose sum is σ = 327236321280. Its totient is φ = 112952232000.

The previous prime is 206146609789. The next prime is 206146609829. The reversal of 206146609809 is 908906641602.

It is an interprime number because it is at equal distance from previous prime (206146609789) and next prime (206146609829).

It is not a de Polignac number, because 206146609809 - 2⁵ = 206146609777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206146609829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1381617 + ... + 1523534.

It is an arithmetic number, because the mean of its divisors is an integer number (10226135040).

Almost surely, 2^206146609809 is an apocalyptic number.

It is an amenable number.

206146609809 is a deficient number, since it is larger than the sum of its proper divisors (121089711471).

206146609809 is a wasteful number, since it uses less digits than its factorization.

206146609809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905301.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 206146609809 in words is "two hundred six billion, one hundred forty-six million, six hundred nine thousand, eight hundred nine".