123356244661 has 8 divisors (see below), whose sum is σ = 137426055480. Its totient is φ = 109940843712.

The previous prime is 123356244643. The next prime is 123356244677. The reversal of 123356244661 is 166442653321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13666779025 + 109689465636 = 116905^2 + 331194^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 123356244661 - 2¹¹ = 123356242613 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 (123356244961) 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, 163602070 + ... + 163602823.

It is an arithmetic number, because the mean of its divisors is an integer number (17178256935).

Almost surely, 2^123356244661 is an apocalyptic number.

It is an amenable number.

123356244661 is a deficient number, since it is larger than the sum of its proper divisors (14069810819).

123356244661 is a wasteful number, since it uses less digits than its factorization.

123356244661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327204935.

The product of its digits is 622080, while the sum is 43.

Adding to 123356244661 its reverse (166442653321), we get a palindrome (289798897982).

The spelling of 123356244661 in words is "one hundred twenty-three billion, three hundred fifty-six million, two hundred forty-four thousand, six hundred sixty-one".