226354663651661 has 4 divisors (see below), whose sum is σ = 226752475011900. Its totient is φ = 225956852291424.

The previous prime is 226354663651619. The next prime is 226354663651751. The reversal of 226354663651661 is 166156366453622.

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 149297973750025 + 77056689901636 = 12218755^2 + 8778194^2 .

It is a cyclic number.

It is not a de Polignac number, because 226354663651661 - 2¹⁰ = 226354663650637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 226354663651594 and 226354663651603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226354663653661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198905679266 + ... + 198905680403.

It is an arithmetic number, because the mean of its divisors is an integer number (56688118752975).

Almost surely, 2^{226354663651661} is an apocalyptic number.

It is an amenable number.

226354663651661 is a deficient number, since it is larger than the sum of its proper divisors (397811360239).

226354663651661 is an equidigital number, since it uses as much as digits as its factorization.

226354663651661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397811360238.

The product of its digits is 167961600, while the sum is 62.

The spelling of 226354663651661 in words is "two hundred twenty-six trillion, three hundred fifty-four billion, six hundred sixty-three million, six hundred fifty-one thousand, six hundred sixty-one".