12206561535 has 48 divisors (see below), whose sum is σ = 25014450240. Its totient is φ = 5387719680.

The previous prime is 12206561531. The next prime is 12206561537. The reversal of 12206561535 is 53516560221.

12206561535 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 6 + 5 + 615 + 35 = 666.

It is not a de Polignac number, because 12206561535 - 2² = 12206561531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12206561535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12206561531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 658986 + ... + 677255.

It is an arithmetic number, because the mean of its divisors is an integer number (521134380).

Almost surely, 2^12206561535 is an apocalyptic number.

12206561535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12206561535 is an abundant number, since it is smaller than the sum of its proper divisors (12807888705).

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

12206561535 is a wasteful number, since it uses less digits than its factorization.

12206561535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336288 (or 1336285 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 12206561535 in words is "twelve billion, two hundred six million, five hundred sixty-one thousand, five hundred thirty-five".