206494756161 has 4 divisors (see below), whose sum is σ = 275326341552. Its totient is φ = 137663170772.

The previous prime is 206494756129. The next prime is 206494756163. The reversal of 206494756161 is 161657494602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206494756161 - 2⁵ = 206494756129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206494756163) 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, 34415792691 + ... + 34415792696.

It is an arithmetic number, because the mean of its divisors is an integer number (68831585388).

Almost surely, 2^206494756161 is an apocalyptic number.

It is an amenable number.

206494756161 is a deficient number, since it is larger than the sum of its proper divisors (68831585391).

206494756161 is an equidigital number, since it uses as much as digits as its factorization.

206494756161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68831585390.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 206494756161 in words is "two hundred six billion, four hundred ninety-four million, seven hundred fifty-six thousand, one hundred sixty-one".