206564236415 has 8 divisors (see below), whose sum is σ = 255873118848. Its totient is φ = 159920699040.

The previous prime is 206564236343. The next prime is 206564236471. The reversal of 206564236415 is 514632465602.

It is a happy number.

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

It is not a de Polignac number, because 206564236415 - 2⁸ = 206564236159 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666336092 + ... + 666336401.

It is an arithmetic number, because the mean of its divisors is an integer number (31984139856).

Almost surely, 2^206564236415 is an apocalyptic number.

206564236415 is a deficient number, since it is larger than the sum of its proper divisors (49308882433).

206564236415 is a wasteful number, since it uses less digits than its factorization.

206564236415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332672529.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 206564236415 in words is "two hundred six billion, five hundred sixty-four million, two hundred thirty-six thousand, four hundred fifteen".