12355686261 has 12 divisors (see below), whose sum is σ = 17853338880. Its totient is φ = 8234245800.

The previous prime is 12355686223. The next prime is 12355686283. The reversal of 12355686261 is 16268655321.

12355686261 is a `hidden beast` number, since 1 + 23 + 5 + 568 + 6 + 2 + 61 = 666.

It is not a de Polignac number, because 12355686261 - 2¹¹ = 12355684213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12355686361) 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 11 ways as a sum of consecutive naturals, for example, 212515 + ... + 264336.

It is an arithmetic number, because the mean of its divisors is an integer number (1487778240).

Almost surely, 2^12355686261 is an apocalyptic number.

It is an amenable number.

12355686261 is a deficient number, since it is larger than the sum of its proper divisors (5497652619).

12355686261 is a wasteful number, since it uses less digits than its factorization.

12355686261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479736 (or 479733 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 12355686261 in words is "twelve billion, three hundred fifty-five million, six hundred eighty-six thousand, two hundred sixty-one".