206400655 has 8 divisors (see below), whose sum is σ = 262250352. Its totient is φ = 155407488.

The previous prime is 206400653. The next prime is 206400659. The reversal of 206400655 is 556004602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206400655 - 2¹ = 206400653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206400653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214037 + ... + 1214206.

It is an arithmetic number, because the mean of its divisors is an integer number (32781294).

Almost surely, 2^206400655 is an apocalyptic number.

206400655 is a deficient number, since it is larger than the sum of its proper divisors (55849697).

206400655 is a wasteful number, since it uses less digits than its factorization.

206400655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428265.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 206400655 is about 14366.6507927213. The cubic root of 206400655 is about 590.9766978806.

The spelling of 206400655 in words is "two hundred six million, four hundred thousand, six hundred fifty-five".