13605261985728 has 168 divisors, whose sum is σ = 46527065442000. Its totient is φ = 3887217686016.

The previous prime is 13605261985697. The next prime is 13605261985751. The reversal of 13605261985728 is 82758916250631.

13605261985728 is a `hidden beast` number, since 1 + 3 + 6 + 0 + 5 + 2 + 619 + 8 + 5 + 7 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80256303 + ... + 80425646.

Almost surely, 2^{13605261985728} is an apocalyptic number.

13605261985728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13605261985728 is an abundant number, since it is smaller than the sum of its proper divisors (32921803456272).

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

13605261985728 is a wasteful number, since it uses less digits than its factorization.

13605261985728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160681984 (or 160681961 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 13605261985728 in words is "thirteen trillion, six hundred five billion, two hundred sixty-one million, nine hundred eighty-five thousand, seven hundred twenty-eight".