206220005345461 has 4 divisors (see below), whose sum is σ = 218350593895212. Its totient is φ = 194089416795712.

The previous prime is 206220005345429. The next prime is 206220005345479. The reversal of 206220005345461 is 164543500022602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167076150530436 + 39143854815025 = 12925794^2 + 6256505^2 .

It is a cyclic number.

It is not a de Polignac number, because 206220005345461 - 2⁵ = 206220005345429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206220005343461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6065294274850 + ... + 6065294274883.

It is an arithmetic number, because the mean of its divisors is an integer number (54587648473803).

Almost surely, 2^{206220005345461} is an apocalyptic number.

It is an amenable number.

206220005345461 is a deficient number, since it is larger than the sum of its proper divisors (12130588549751).

206220005345461 is a wasteful number, since it uses less digits than its factorization.

206220005345461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12130588549750.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 206220005345461 in words is "two hundred six trillion, two hundred twenty billion, five million, three hundred forty-five thousand, four hundred sixty-one".