206554326160161 has 32 divisors (see below), whose sum is σ = 332024664591360. Its totient is φ = 111579442370496.

The previous prime is 206554326160033. The next prime is 206554326160201. The reversal of 206554326160161 is 161061623455602.

It is a happy number.

It is not a de Polignac number, because 206554326160161 - 2⁷ = 206554326160033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206554326160161.

It is not an unprimeable number, because it can be changed into a prime (206554326160661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 554074926 + ... + 554447591.

It is an arithmetic number, because the mean of its divisors is an integer number (10375770768480).

Almost surely, 2^{206554326160161} is an apocalyptic number.

206554326160161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

206554326160161 is a deficient number, since it is larger than the sum of its proper divisors (125470338431199).

206554326160161 is a wasteful number, since it uses less digits than its factorization.

206554326160161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108523013.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 206554326160161 in words is "two hundred six trillion, five hundred fifty-four billion, three hundred twenty-six million, one hundred sixty thousand, one hundred sixty-one".