226621562511561 has 8 divisors (see below), whose sum is σ = 345328095255744. Its totient is φ = 129498035720880.

The previous prime is 226621562511551. The next prime is 226621562511607. The reversal of 226621562511561 is 165115265126622.

It is a happy number.

226621562511561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 226621562511561 - 2¹⁴ = 226621562495177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (226621562511551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5395751488350 + ... + 5395751488391.

It is an arithmetic number, because the mean of its divisors is an integer number (43166011906968).

Almost surely, 2^{226621562511561} is an apocalyptic number.

226621562511561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

226621562511561 is a deficient number, since it is larger than the sum of its proper divisors (118706532744183).

226621562511561 is a wasteful number, since it uses less digits than its factorization.

226621562511561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10791502976751.

The product of its digits is 2592000, while the sum is 51.

The spelling of 226621562511561 in words is "two hundred twenty-six trillion, six hundred twenty-one billion, five hundred sixty-two million, five hundred eleven thousand, five hundred sixty-one".