12681551571 has 16 divisors (see below), whose sum is σ = 18220011936. Its totient is φ = 7799486976.

The previous prime is 12681551537. The next prime is 12681551587. The reversal of 12681551571 is 17515518621.

It is not a de Polignac number, because 12681551571 - 2⁹ = 12681551059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12681501571) 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, 26230 + ... + 161403.

It is an arithmetic number, because the mean of its divisors is an integer number (1138750746).

Almost surely, 2^12681551571 is an apocalyptic number.

12681551571 is a deficient number, since it is larger than the sum of its proper divisors (5538460365).

12681551571 is a wasteful number, since it uses less digits than its factorization.

12681551571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189382.

The product of its digits is 84000, while the sum is 42.

The spelling of 12681551571 in words is "twelve billion, six hundred eighty-one million, five hundred fifty-one thousand, five hundred seventy-one".