12261651320636 has 6 divisors (see below), whose sum is σ = 21457889811120. Its totient is φ = 6130825660316.

The previous prime is 12261651320599. The next prime is 12261651320641. The reversal of 12261651320636 is 63602315616221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1532706415076 + ... + 1532706415083.

It is an arithmetic number, because the mean of its divisors is an integer number (3576314968520).

Almost surely, 2^{12261651320636} is an apocalyptic number.

It is an amenable number.

12261651320636 is a deficient number, since it is larger than the sum of its proper divisors (9196238490484).

12261651320636 is a wasteful number, since it uses less digits than its factorization.

12261651320636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065412830163 (or 3065412830161 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 44.

Adding to 12261651320636 its reverse (63602315616221), we get a palindrome (75863966936857).

The spelling of 12261651320636 in words is "twelve trillion, two hundred sixty-one billion, six hundred fifty-one million, three hundred twenty thousand, six hundred thirty-six".