13609821406 has 8 divisors (see below), whose sum is σ = 20463455880. Its totient is φ = 6788669448.

The previous prime is 13609821403. The next prime is 13609821409. The reversal of 13609821406 is 60412890631.

It is an interprime number because it is at equal distance from previous prime (13609821403) and next prime (13609821409).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13609821403) by changing a digit.

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, 8119581 + ... + 8121256.

It is an arithmetic number, because the mean of its divisors is an integer number (2557931985).

Almost surely, 2^13609821406 is an apocalyptic number.

13609821406 is a deficient number, since it is larger than the sum of its proper divisors (6853634474).

13609821406 is a wasteful number, since it uses less digits than its factorization.

13609821406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16241258.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 13609821406 in words is "thirteen billion, six hundred nine million, eight hundred twenty-one thousand, four hundred six".