206434520511 has 16 divisors (see below), whose sum is σ = 284819665920. Its totient is φ = 132857904960.

The previous prime is 206434520507. The next prime is 206434520521. The reversal of 206434520511 is 115025434602.

206434520511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 206434520511 - 2² = 206434520507 is a prime.

It is a super-2 number, since 2×206434520511² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206434520521) 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, 2675565 + ... + 2751638.

It is an arithmetic number, because the mean of its divisors is an integer number (17801229120).

Almost surely, 2^206434520511 is an apocalyptic number.

206434520511 is a deficient number, since it is larger than the sum of its proper divisors (78385145409).

206434520511 is a wasteful number, since it uses less digits than its factorization.

206434520511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5427646.

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 206434520511 in words is "two hundred six billion, four hundred thirty-four million, five hundred twenty thousand, five hundred eleven".