13721116615 has 8 divisors (see below), whose sum is σ = 16996480128. Its totient is φ = 10622799840.

The previous prime is 13721116571. The next prime is 13721116709. The reversal of 13721116615 is 51661112731.

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

It is not a de Polignac number, because 13721116615 - 2¹¹ = 13721114567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44261512 + ... + 44261821.

It is an arithmetic number, because the mean of its divisors is an integer number (2124560016).

Almost surely, 2^13721116615 is an apocalyptic number.

13721116615 is a deficient number, since it is larger than the sum of its proper divisors (3275363513).

13721116615 is an equidigital number, since it uses as much as digits as its factorization.

13721116615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88523369.

The product of its digits is 7560, while the sum is 34.

The spelling of 13721116615 in words is "thirteen billion, seven hundred twenty-one million, one hundred sixteen thousand, six hundred fifteen".