13445644334 has 4 divisors (see below), whose sum is σ = 20168466504. Its totient is φ = 6722822166.

The previous prime is 13445644319. The next prime is 13445644337. The reversal of 13445644334 is 43344654431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43344654431 = 13 ⋅3334204187.

It is a junction number, because it is equal to n+sod(n) for n = 13445644291 and 13445644300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13445644337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3361411082 + ... + 3361411085.

It is an arithmetic number, because the mean of its divisors is an integer number (5042116626).

Almost surely, 2^13445644334 is an apocalyptic number.

13445644334 is a deficient number, since it is larger than the sum of its proper divisors (6722822170).

13445644334 is an equidigital number, since it uses as much as digits as its factorization.

13445644334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6722822169.

The product of its digits is 829440, while the sum is 41.

The spelling of 13445644334 in words is "thirteen billion, four hundred forty-five million, six hundred forty-four thousand, three hundred thirty-four".