13081445616 has 20 divisors (see below), whose sum is σ = 33793734632. Its totient is φ = 4360481856.

The previous prime is 13081445591. The next prime is 13081445633. The reversal of 13081445616 is 61654418031.

It is a super-2 number, since 2×13081445616² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136265011 + ... + 136265106.

Almost surely, 2^13081445616 is an apocalyptic number.

13081445616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13081445616 is an abundant number, since it is smaller than the sum of its proper divisors (20712289016).

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

13081445616 is a wasteful number, since it uses less digits than its factorization.

13081445616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272530128 (or 272530122 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 13081445616 in words is "thirteen billion, eighty-one million, four hundred forty-five thousand, six hundred sixteen".