13388155906 has 4 divisors (see below), whose sum is σ = 20082233862. Its totient is φ = 6694077952.

The previous prime is 13388155901. The next prime is 13388155939. The reversal of 13388155906 is 60955188331.

13388155906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10151570025 + 3236585881 = 100755^2 + 56891^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13388155906.

It is not an unprimeable number, because it can be changed into a prime (13388155901) 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 as a sum of consecutive naturals, namely, 3347038975 + ... + 3347038978.

Almost surely, 2^13388155906 is an apocalyptic number.

13388155906 is a deficient number, since it is larger than the sum of its proper divisors (6694077956).

13388155906 is an equidigital number, since it uses as much as digits as its factorization.

13388155906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6694077955.

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 13388155906 in words is "thirteen billion, three hundred eighty-eight million, one hundred fifty-five thousand, nine hundred six".