206440655245 has 16 divisors (see below), whose sum is σ = 270319498560. Its totient is φ = 150099817600.

The previous prime is 206440655237. The next prime is 206440655251. The reversal of 206440655245 is 542556044602.

It is a happy number.

It is not a de Polignac number, because 206440655245 - 2³ = 206440655237 is a prime.

It is a congruent number.

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, 270115 + ... + 697024.

It is an arithmetic number, because the mean of its divisors is an integer number (16894968660).

Almost surely, 2^206440655245 is an apocalyptic number.

It is an amenable number.

206440655245 is a deficient number, since it is larger than the sum of its proper divisors (63878843315).

206440655245 is a wasteful number, since it uses less digits than its factorization.

206440655245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971036.

The product of its (nonzero) digits is 1152000, while the sum is 43.

Adding to 206440655245 its reverse (542556044602), we get a palindrome (748996699847).

The spelling of 206440655245 in words is "two hundred six billion, four hundred forty million, six hundred fifty-five thousand, two hundred forty-five".