12261651320634 has 8 divisors (see below), whose sum is σ = 24523302641280. Its totient is φ = 4087217106876.

The previous prime is 12261651320599. The next prime is 12261651320641. The reversal of 12261651320634 is 43602315616221.

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

12261651320634 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021804276714 + ... + 1021804276725.

It is an arithmetic number, because the mean of its divisors is an integer number (3065412830160).

Almost surely, 2^{12261651320634} is an apocalyptic number.

12261651320634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12261651320634 is a wasteful number, since it uses less digits than its factorization.

12261651320634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043608553444.

The product of its (nonzero) digits is 311040, while the sum is 42.

Adding to 12261651320634 its reverse (43602315616221), we get a palindrome (55863966936855).

The spelling of 12261651320634 in words is "twelve trillion, two hundred sixty-one billion, six hundred fifty-one million, three hundred twenty thousand, six hundred thirty-four".