13897394571728 has 40 divisors (see below), whose sum is σ = 27290867835168. Its totient is φ = 6854837305472.

The previous prime is 13897394571727. The next prime is 13897394571761. The reversal of 13897394571728 is 82717549379831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13897394571727) 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, 6829826 + ... + 8627937.

Almost surely, 2^{13897394571728} is an apocalyptic number.

It is an amenable number.

13897394571728 is a deficient number, since it is larger than the sum of its proper divisors (13393473263440).

13897394571728 is a wasteful number, since it uses less digits than its factorization.

13897394571728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15458531 (or 15458525 counting only the distinct ones).

The product of its digits is 640120320, while the sum is 74.

The spelling of 13897394571728 in words is "thirteen trillion, eight hundred ninety-seven billion, three hundred ninety-four million, five hundred seventy-one thousand, seven hundred twenty-eight".