13897394571726 has 24 divisors (see below), whose sum is σ = 30560439807144. Its totient is φ = 4563323590320.

The previous prime is 13897394571691. The next prime is 13897394571727. The reversal of 13897394571726 is 62717549379831.

13897394571726 is a `hidden beast` number, since 1 + 3 + 89 + 73 + 9 + 457 + 1 + 7 + 26 = 666.

13897394571726 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11 ways as a sum of consecutive naturals, for example, 5761771005 + ... + 5761773416.

It is an arithmetic number, because the mean of its divisors is an integer number (1273351658631).

Almost surely, 2^{13897394571726} is an apocalyptic number.

13897394571726 is an abundant number, since it is smaller than the sum of its proper divisors (16663045235418).

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

13897394571726 is a wasteful number, since it uses less digits than its factorization.

13897394571726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11523544496 (or 11523544493 counting only the distinct ones).

The product of its digits is 480090240, while the sum is 72.

The spelling of 13897394571726 in words is "thirteen trillion, eight hundred ninety-seven billion, three hundred ninety-four million, five hundred seventy-one thousand, seven hundred twenty-six".