206500013161 has 16 divisors (see below), whose sum is σ = 231414397200. Its totient is φ = 184042395264.

The previous prime is 206500013131. The next prime is 206500013177. The reversal of 206500013161 is 161310005602.

It can be written as a sum of positive squares in 8 ways, for example, as 171018639936 + 35481373225 = 413544^2 + 188365^2 .

It is not a de Polignac number, because 206500013161 - 2⁵ = 206500013129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206500013131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1556836 + ... + 1684261.

It is an arithmetic number, because the mean of its divisors is an integer number (14463399825).

Almost surely, 2^206500013161 is an apocalyptic number.

It is an amenable number.

206500013161 is a deficient number, since it is larger than the sum of its proper divisors (24914384039).

206500013161 is an equidigital number, since it uses as much as digits as its factorization.

206500013161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241165 (or 3241139 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 206500013161 its reverse (161310005602), we get a palindrome (367810018763).

The spelling of 206500013161 in words is "two hundred six billion, five hundred million, thirteen thousand, one hundred sixty-one".