206505453605 has 32 divisors (see below), whose sum is σ = 275546078208. Its totient is φ = 147304396800.

The previous prime is 206505453569. The next prime is 206505453611. The reversal of 206505453605 is 506354505602.

It is not a de Polignac number, because 206505453605 - 2⁶ = 206505453541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1097132 + ... + 1271498.

It is an arithmetic number, because the mean of its divisors is an integer number (8610814944).

Almost surely, 2^206505453605 is an apocalyptic number.

It is an amenable number.

206505453605 is a deficient number, since it is larger than the sum of its proper divisors (69040624603).

206505453605 is a wasteful number, since it uses less digits than its factorization.

206505453605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174797.

The product of its (nonzero) digits is 540000, while the sum is 41.

The spelling of 206505453605 in words is "two hundred six billion, five hundred five million, four hundred fifty-three thousand, six hundred five".