206115864 has 16 divisors (see below), whose sum is σ = 515289720. Its totient is φ = 68705280.

The previous prime is 206115841. The next prime is 206115893. The reversal of 206115864 is 468511602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4294057 + ... + 4294104.

Almost surely, 2^206115864 is an apocalyptic number.

206115864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

206115864 is an abundant number, since it is smaller than the sum of its proper divisors (309173856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206115864 is a wasteful number, since it uses less digits than its factorization.

206115864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8588170 (or 8588166 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 206115864 is about 14356.7358407125. The cubic root of 206115864 is about 590.7047634836.

The spelling of 206115864 in words is "two hundred six million, one hundred fifteen thousand, eight hundred sixty-four".