206266181135215 has 64 divisors (see below), whose sum is σ = 253755887616000. Its totient is φ = 160930962210816.

The previous prime is 206266181135207. The next prime is 206266181135243. The reversal of 206266181135215 is 512531181662602.

It is a cyclic number.

It is not a de Polignac number, because 206266181135215 - 2³ = 206266181135207 is a prime.

It is a super-2 number, since 2×206266181135215² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3788218311 + ... + 3788272759.

It is an arithmetic number, because the mean of its divisors is an integer number (3964935744000).

Almost surely, 2^{206266181135215} is an apocalyptic number.

206266181135215 is a deficient number, since it is larger than the sum of its proper divisors (47489706480785).

206266181135215 is a wasteful number, since it uses less digits than its factorization.

206266181135215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55144.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 206266181135215 in words is "two hundred six trillion, two hundred sixty-six billion, one hundred eighty-one million, one hundred thirty-five thousand, two hundred fifteen".