206453914385 has 16 divisors (see below), whose sum is σ = 262383138000. Its totient is φ = 155409002496.

The previous prime is 206453914363. The next prime is 206453914399. The reversal of 206453914385 is 583419354602.

It is a Cunningham number, because it is equal to 454372²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 149915536 + 206303998849 = 12244^2 + 454207^2 .

It is a cyclic number.

It is not a de Polignac number, because 206453914385 - 2²⁰ = 206452865809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44231 + ... + 644099.

It is an arithmetic number, because the mean of its divisors is an integer number (16398946125).

Almost surely, 2^206453914385 is an apocalyptic number.

It is an amenable number.

206453914385 is a deficient number, since it is larger than the sum of its proper divisors (55929223615).

206453914385 is a wasteful number, since it uses less digits than its factorization.

206453914385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603940.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 206453914385 in words is "two hundred six billion, four hundred fifty-three million, nine hundred fourteen thousand, three hundred eighty-five".