13556544406 has 4 divisors (see below), whose sum is σ = 20334816612. Its totient is φ = 6778272202.

The previous prime is 13556544341. The next prime is 13556544409. The reversal of 13556544406 is 60444565531.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13556544409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3389136100 + ... + 3389136103.

It is an arithmetic number, because the mean of its divisors is an integer number (5083704153).

Almost surely, 2^13556544406 is an apocalyptic number.

13556544406 is a deficient number, since it is larger than the sum of its proper divisors (6778272206).

13556544406 is an equidigital number, since it uses as much as digits as its factorization.

13556544406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6778272205.

The product of its (nonzero) digits is 864000, while the sum is 43.

It can be divided in two parts, 135565 and 44406, that added together give a palindrome (179971).

The spelling of 13556544406 in words is "thirteen billion, five hundred fifty-six million, five hundred forty-four thousand, four hundred six".