611221663223 has 4 divisors (see below), whose sum is σ = 611938219368. Its totient is φ = 610505107080.

The previous prime is 611221663189. The next prime is 611221663303. The reversal of 611221663223 is 322366122116.

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

It is a cyclic number.

It is not a de Polignac number, because 611221663223 - 2⁸ = 611221662967 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 (611221653223) 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, 358276793 + ... + 358278498.

It is an arithmetic number, because the mean of its divisors is an integer number (152984554842).

Almost surely, 2^611221663223 is an apocalyptic number.

611221663223 is a deficient number, since it is larger than the sum of its proper divisors (716556145).

611221663223 is an equidigital number, since it uses as much as digits as its factorization.

611221663223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716556144.

The product of its digits is 31104, while the sum is 35.

Adding to 611221663223 its reverse (322366122116), we get a palindrome (933587785339).

The spelling of 611221663223 in words is "six hundred eleven billion, two hundred twenty-one million, six hundred sixty-three thousand, two hundred twenty-three".