13861109506 has 8 divisors (see below), whose sum is σ = 20795356620. Its totient is φ = 6929323968.

The previous prime is 13861109491. The next prime is 13861109519. The reversal of 13861109506 is 60590116831.

It can be written as a sum of positive squares in 2 ways, for example, as 13827643281 + 33466225 = 117591^2 + 5785^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 601251 + ... + 623878.

Almost surely, 2^13861109506 is an apocalyptic number.

13861109506 is a deficient number, since it is larger than the sum of its proper divisors (6934247114).

13861109506 is a wasteful number, since it uses less digits than its factorization.

13861109506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230788.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 13861109506 in words is "thirteen billion, eight hundred sixty-one million, one hundred nine thousand, five hundred six".