206679822497 has 4 divisors (see below), whose sum is σ = 215665901760. Its totient is φ = 197693743236.

The previous prime is 206679822487. The next prime is 206679822509. The reversal of 206679822497 is 794228976602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206679822497 - 2²⁰ = 206678773921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206679822487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4493039597 + ... + 4493039642.

It is an arithmetic number, because the mean of its divisors is an integer number (53916475440).

Almost surely, 2^206679822497 is an apocalyptic number.

It is an amenable number.

206679822497 is a deficient number, since it is larger than the sum of its proper divisors (8986079263).

206679822497 is an equidigital number, since it uses as much as digits as its factorization.

206679822497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8986079262.

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 206679822497 in words is "two hundred six billion, six hundred seventy-nine million, eight hundred twenty-two thousand, four hundred ninety-seven".