13205653987 has 8 divisors (see below), whose sum is σ = 13785730560. Its totient is φ = 12626070600.

The previous prime is 13205653973. The next prime is 13205653997. The reversal of 13205653987 is 78935650231.

13205653987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13205653987 - 2²³ = 13197265379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13205653987.

It is not an unprimeable number, because it can be changed into a prime (13205653997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68037 + ... + 176182.

It is an arithmetic number, because the mean of its divisors is an integer number (1723216320).

Almost surely, 2^13205653987 is an apocalyptic number.

13205653987 is a deficient number, since it is larger than the sum of its proper divisors (580076573).

13205653987 is a wasteful number, since it uses less digits than its factorization.

13205653987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246593.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 13205653987 in words is "thirteen billion, two hundred five million, six hundred fifty-three thousand, nine hundred eighty-seven".