206611361605 has 16 divisors (see below), whose sum is σ = 272602773504. Its totient is φ = 149079631680.

The previous prime is 206611361549. The next prime is 206611361659. The reversal of 206611361605 is 506163116602.

It is not a de Polignac number, because 206611361605 - 2¹⁹ = 206610837317 is a prime.

It is a Duffinian number.

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, 14782662 + ... + 14796631.

It is an arithmetic number, because the mean of its divisors is an integer number (17037673344).

Almost surely, 2^206611361605 is an apocalyptic number.

It is an amenable number.

206611361605 is a deficient number, since it is larger than the sum of its proper divisors (65991411899).

206611361605 is a wasteful number, since it uses less digits than its factorization.

206611361605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29579436.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 206611361605 in words is "two hundred six billion, six hundred eleven million, three hundred sixty-one thousand, six hundred five".