12687154161 has 16 divisors (see below), whose sum is σ = 18564553728. Its totient is φ = 7643138000.

The previous prime is 12687154121. The next prime is 12687154163. The reversal of 12687154161 is 16145178621.

It is a cyclic number.

It is not a de Polignac number, because 12687154161 - 2¹⁸ = 12686892017 is a prime.

It is a super-2 number, since 2×12687154161² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12687154163) 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, 1145565 + ... + 1156586.

It is an arithmetic number, because the mean of its divisors is an integer number (1160284608).

Almost surely, 2^12687154161 is an apocalyptic number.

12687154161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12687154161 is a deficient number, since it is larger than the sum of its proper divisors (5877399567).

12687154161 is a wasteful number, since it uses less digits than its factorization.

12687154161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302332.

The product of its digits is 80640, while the sum is 42.

The spelling of 12687154161 in words is "twelve billion, six hundred eighty-seven million, one hundred fifty-four thousand, one hundred sixty-one".