206413603605 has 48 divisors (see below), whose sum is σ = 391581013824. Its totient is φ = 99753258240.

The previous prime is 206413603559. The next prime is 206413603639. The reversal of 206413603605 is 506306314602.

206413603605 is a `hidden beast` number, since 2 + 0 + 6 + 41 + 3 + 6 + 0 + 3 + 605 = 666.

It is not a de Polignac number, because 206413603605 - 2¹⁵ = 206413570837 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 206413603605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 527184 + ... + 831113.

It is an arithmetic number, because the mean of its divisors is an integer number (8157937788).

Almost surely, 2^206413603605 is an apocalyptic number.

It is an amenable number.

206413603605 is a deficient number, since it is larger than the sum of its proper divisors (185167410219).

206413603605 is a wasteful number, since it uses less digits than its factorization.

206413603605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358626 (or 1358623 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

It can be divided in two parts, 206413 and 603605, that added together give a palindrome (810018).

The spelling of 206413603605 in words is "two hundred six billion, four hundred thirteen million, six hundred three thousand, six hundred five".