206230651561 has 8 divisors (see below), whose sum is σ = 236819887200. Its totient is φ = 177614915040.

The previous prime is 206230651513. The next prime is 206230651567. The reversal of 206230651561 is 165156032602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206230651561 - 2²⁷ = 206096433833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206230651561.

It is not an unprimeable number, because it can be changed into a prime (206230651567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493374556 + ... + 493374973.

It is an arithmetic number, because the mean of its divisors is an integer number (29602485900).

Almost surely, 2^206230651561 is an apocalyptic number.

It is an amenable number.

206230651561 is a deficient number, since it is larger than the sum of its proper divisors (30589235639).

206230651561 is a wasteful number, since it uses less digits than its factorization.

206230651561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986749559.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 206230651561 in words is "two hundred six billion, two hundred thirty million, six hundred fifty-one thousand, five hundred sixty-one".