206494748521 has 32 divisors (see below), whose sum is σ = 236962091520. Its totient is φ = 178714368000.

The previous prime is 206494748507. The next prime is 206494748569. The reversal of 206494748521 is 125847494602.

It is a cyclic number.

It is not a de Polignac number, because 206494748521 - 2¹¹ = 206494746473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206494748321) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2569296 + ... + 2648446.

It is an arithmetic number, because the mean of its divisors is an integer number (7405065360).

Almost surely, 2^206494748521 is an apocalyptic number.

It is an amenable number.

206494748521 is a deficient number, since it is larger than the sum of its proper divisors (30467342999).

206494748521 is a wasteful number, since it uses less digits than its factorization.

206494748521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79425.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 206494748521 in words is "two hundred six billion, four hundred ninety-four million, seven hundred forty-eight thousand, five hundred twenty-one".