13215154544 has 40 divisors (see below), whose sum is σ = 27126107568. Its totient is φ = 6215316480.

The previous prime is 13215154529. The next prime is 13215154549. The reversal of 13215154544 is 44545151231.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13215154549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493139 + ... + 519245.

Almost surely, 2^13215154544 is an apocalyptic number.

It is an amenable number.

13215154544 is an abundant number, since it is smaller than the sum of its proper divisors (13910953024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13215154544 is a wasteful number, since it uses less digits than its factorization.

13215154544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27993 (or 27987 counting only the distinct ones).

The product of its digits is 48000, while the sum is 35.

The spelling of 13215154544 in words is "thirteen billion, two hundred fifteen million, one hundred fifty-four thousand, five hundred forty-four".