13868781487 has 16 divisors (see below), whose sum is σ = 15480524160. Its totient is φ = 12318156000.

The previous prime is 13868781469. The next prime is 13868781497. The reversal of 13868781487 is 78418786831.

It is a cyclic number.

It is not a de Polignac number, because 13868781487 - 2¹¹ = 13868779439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13868781497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40237 + ... + 171337.

It is an arithmetic number, because the mean of its divisors is an integer number (967532760).

Almost surely, 2^13868781487 is an apocalyptic number.

13868781487 is a deficient number, since it is larger than the sum of its proper divisors (1611742673).

13868781487 is a wasteful number, since it uses less digits than its factorization.

13868781487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131334.

The product of its digits is 14450688, while the sum is 61.

The spelling of 13868781487 in words is "thirteen billion, eight hundred sixty-eight million, seven hundred eighty-one thousand, four hundred eighty-seven".