13328442639 has 24 divisors (see below), whose sum is σ = 20294976000. Its totient is φ = 8405706960.

The previous prime is 13328442619. The next prime is 13328442643. The reversal of 13328442639 is 93624482331.

13328442639 is a `hidden beast` number, since 1 + 3 + 3 + 2 + 8 + 4 + 4 + 2 + 639 = 666.

It is not a de Polignac number, because 13328442639 - 2¹⁷ = 13328311567 is a prime.

It is a super-2 number, since 2×13328442639² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13328442594 and 13328442603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13328442619) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61762 + ... + 174560.

It is an arithmetic number, because the mean of its divisors is an integer number (845624000).

Almost surely, 2^13328442639 is an apocalyptic number.

13328442639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13328442639 is a deficient number, since it is larger than the sum of its proper divisors (6966533361).

13328442639 is a wasteful number, since it uses less digits than its factorization.

13328442639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113515 (or 113512 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The spelling of 13328442639 in words is "thirteen billion, three hundred twenty-eight million, four hundred forty-two thousand, six hundred thirty-nine".