206426253061 has 16 divisors (see below), whose sum is σ = 236831662080. Its totient is φ = 176250083760.

The previous prime is 206426253049. The next prime is 206426253097. The reversal of 206426253061 is 160352624602.

206426253061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206426253061 is a prime.

It is a super-2 number, since 2×206426253061² (a number of 23 digits) contains 22 as substring.

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 206426253061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206426253001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19456020 + ... + 19466626.

It is an arithmetic number, because the mean of its divisors is an integer number (14801978880).

Almost surely, 2^206426253061 is an apocalyptic number.

It is an amenable number.

206426253061 is a deficient number, since it is larger than the sum of its proper divisors (30405409019).

206426253061 is a wasteful number, since it uses less digits than its factorization.

206426253061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21144.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 206426253061 its reverse (160352624602), we get a palindrome (366778877663).

The spelling of 206426253061 in words is "two hundred six billion, four hundred twenty-six million, two hundred fifty-three thousand, sixty-one".