13432321615 has 4 divisors (see below), whose sum is σ = 16118785944. Its totient is φ = 10745857288.

The previous prime is 13432321613. The next prime is 13432321633. The reversal of 13432321615 is 51612323431.

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

It is a cyclic number.

It is not a de Polignac number, because 13432321615 - 2¹ = 13432321613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13432321613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343232157 + ... + 1343232166.

It is an arithmetic number, because the mean of its divisors is an integer number (4029696486).

Almost surely, 2^13432321615 is an apocalyptic number.

13432321615 is a deficient number, since it is larger than the sum of its proper divisors (2686464329).

13432321615 is an equidigital number, since it uses as much as digits as its factorization.

13432321615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686464328.

The product of its digits is 12960, while the sum is 31.

The spelling of 13432321615 in words is "thirteen billion, four hundred thirty-two million, three hundred twenty-one thousand, six hundred fifteen".