611222643661 has 8 divisors (see below), whose sum is σ = 698563161344. Its totient is φ = 523887875280.

The previous prime is 611222643611. The next prime is 611222643701. The reversal of 611222643661 is 166346222116.

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

It is not a de Polignac number, because 611222643661 - 2¹³ = 611222635469 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 (611222643611) 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 7 ways as a sum of consecutive naturals, for example, 1207050 + ... + 1636891.

It is an arithmetic number, because the mean of its divisors is an integer number (87320395168).

Almost surely, 2^611222643661 is an apocalyptic number.

It is an amenable number.

611222643661 is a deficient number, since it is larger than the sum of its proper divisors (87340517683).

611222643661 is a wasteful number, since it uses less digits than its factorization.

611222643661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874651.

The product of its digits is 124416, while the sum is 40.

Adding to 611222643661 its reverse (166346222116), we get a palindrome (777568865777).

The spelling of 611222643661 in words is "six hundred eleven billion, two hundred twenty-two million, six hundred forty-three thousand, six hundred sixty-one".