12261645661233 has 8 divisors (see below), whose sum is σ = 16348877524096. Its totient is φ = 8174422119600.

The previous prime is 12261645661207. The next prime is 12261645661297. The reversal of 12261645661233 is 33216654616221.

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

It is not a de Polignac number, because 12261645661233 - 2¹³ = 12261645653041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12261645641233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3484488 + ... + 6055158.

It is an arithmetic number, because the mean of its divisors is an integer number (2043609690512).

Almost surely, 2^{12261645661233} is an apocalyptic number.

It is an amenable number.

12261645661233 is a deficient number, since it is larger than the sum of its proper divisors (4087231862863).

12261645661233 is a wasteful number, since it uses less digits than its factorization.

12261645661233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160615.

The product of its digits is 1866240, while the sum is 48.

The spelling of 12261645661233 in words is "twelve trillion, two hundred sixty-one billion, six hundred forty-five million, six hundred sixty-one thousand, two hundred thirty-three".