206502006511 has 4 divisors (see below), whose sum is σ = 210895666272. Its totient is φ = 202108346752.

The previous prime is 206502006493. The next prime is 206502006539. The reversal of 206502006511 is 115600205602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206502006511 - 2²³ = 206493617903 is a prime.

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 206502006511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206502006551) 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, 2196829810 + ... + 2196829903.

It is an arithmetic number, because the mean of its divisors is an integer number (52723916568).

Almost surely, 2^206502006511 is an apocalyptic number.

206502006511 is a deficient number, since it is larger than the sum of its proper divisors (4393659761).

206502006511 is an equidigital number, since it uses as much as digits as its factorization.

206502006511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393659760.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 206502006511 in words is "two hundred six billion, five hundred two million, six thousand, five hundred eleven".