206234512136 has 8 divisors (see below), whose sum is σ = 386689710270. Its totient is φ = 103117256064.

The previous prime is 206234512051. The next prime is 206234512139. The reversal of 206234512136 is 631215432602.

It can be written as a sum of positive squares in only one way, i.e., 202023280900 + 4211231236 = 449470^2 + 64894^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 206234512096 and 206234512105.

It is not an unprimeable number, because it can be changed into a prime (206234512139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12889657001 + ... + 12889657016.

Almost surely, 2^206234512136 is an apocalyptic number.

It is an amenable number.

206234512136 is a deficient number, since it is larger than the sum of its proper divisors (180455198134).

206234512136 is a wasteful number, since it uses less digits than its factorization.

206234512136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25779314023 (or 25779314019 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 206234512136 its reverse (631215432602), we get a palindrome (837449944738).

The spelling of 206234512136 in words is "two hundred six billion, two hundred thirty-four million, five hundred twelve thousand, one hundred thirty-six".