226726021991 has 8 divisors (see below), whose sum is σ = 274357539360. Its totient is φ = 182905026048.

The previous prime is 226726021961. The next prime is 226726021997. The reversal of 226726021991 is 199120627622.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226726021991 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 (226726021997) 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, 952630226 + ... + 952630463.

It is an arithmetic number, because the mean of its divisors is an integer number (34294692420).

Almost surely, 2^226726021991 is an apocalyptic number.

226726021991 is a deficient number, since it is larger than the sum of its proper divisors (47631517369).

226726021991 is a wasteful number, since it uses less digits than its factorization.

226726021991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905260713.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 226726021991 in words is "two hundred twenty-six billion, seven hundred twenty-six million, twenty-one thousand, nine hundred ninety-one".