12207987805 has 16 divisors (see below), whose sum is σ = 15780885120. Its totient is φ = 9012610368.

The previous prime is 12207987769. The next prime is 12207987811. The reversal of 12207987805 is 50878970221.

It is a cyclic number.

It is not a de Polignac number, because 12207987805 - 2¹⁵ = 12207955037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226786 + ... + 275404.

It is an arithmetic number, because the mean of its divisors is an integer number (986305320).

Almost surely, 2^12207987805 is an apocalyptic number.

It is an amenable number.

12207987805 is a deficient number, since it is larger than the sum of its proper divisors (3572897315).

12207987805 is a wasteful number, since it uses less digits than its factorization.

12207987805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52500.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 12207987805 in words is "twelve billion, two hundred seven million, nine hundred eighty-seven thousand, eight hundred five".