13857666537 has 16 divisors (see below), whose sum is σ = 21707114688. Its totient is φ = 7752540480.

The previous prime is 13857666527. The next prime is 13857666607. The reversal of 13857666537 is 73566675831.

It is not a de Polignac number, because 13857666537 - 2⁷ = 13857666409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13857666527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16150698 + ... + 16151555.

It is an arithmetic number, because the mean of its divisors is an integer number (1356694668).

Almost surely, 2^13857666537 is an apocalyptic number.

It is an amenable number.

13857666537 is a deficient number, since it is larger than the sum of its proper divisors (7849448151).

13857666537 is a wasteful number, since it uses less digits than its factorization.

13857666537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32302280.

The product of its digits is 19051200, while the sum is 57.

It can be divided in two parts, 138 and 57666537, that added together give a palindrome (57666675).

The spelling of 13857666537 in words is "thirteen billion, eight hundred fifty-seven million, six hundred sixty-six thousand, five hundred thirty-seven".