13115394506 has 4 divisors (see below), whose sum is σ = 19673091762. Its totient is φ = 6557697252.

The previous prime is 13115394503. The next prime is 13115394553. The reversal of 13115394506 is 60549351131.

13115394506 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., 13077066025 + 38328481 = 114355^2 + 6191^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13115394506.

It is not an unprimeable number, because it can be changed into a prime (13115394503) 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, 3278848625 + ... + 3278848628.

Almost surely, 2^13115394506 is an apocalyptic number.

13115394506 is a deficient number, since it is larger than the sum of its proper divisors (6557697256).

13115394506 is an equidigital number, since it uses as much as digits as its factorization.

13115394506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6557697255.

The product of its (nonzero) digits is 48600, while the sum is 38.

The spelling of 13115394506 in words is "thirteen billion, one hundred fifteen million, three hundred ninety-four thousand, five hundred six".