206185458745 has 36 divisors (see below), whose sum is σ = 297798110820. Its totient is φ = 136483652928.

The previous prime is 206185458733. The next prime is 206185458827. The reversal of 206185458745 is 547854581602.

It can be written as a sum of positive squares in 2 ways, for example, as 91005995584 + 115179463161 = 301672^2 + 339381^2 .

It is not a de Polignac number, because 206185458745 - 2²³ = 206177070137 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38271942 + ... + 38277328.

It is an arithmetic number, because the mean of its divisors is an integer number (8272169745).

Almost surely, 2^206185458745 is an apocalyptic number.

It is an amenable number.

206185458745 is a deficient number, since it is larger than the sum of its proper divisors (91612652075).

206185458745 is an frugal number, since it uses more digits than its factorization.

206185458745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10822 (or 5428 counting only the distinct ones).

The product of its (nonzero) digits is 10752000, while the sum is 55.

The spelling of 206185458745 in words is "two hundred six billion, one hundred eighty-five million, four hundred fifty-eight thousand, seven hundred forty-five".