12685178571 has 8 divisors (see below), whose sum is σ = 18214615440. Its totient is φ = 7806263712.

The previous prime is 12685178557. The next prime is 12685178603. The reversal of 12685178571 is 17587158621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12685178571 - 2⁹ = 12685178059 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12685178071) 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, 162630456 + ... + 162630533.

It is an arithmetic number, because the mean of its divisors is an integer number (2276826930).

Almost surely, 2^12685178571 is an apocalyptic number.

12685178571 is a deficient number, since it is larger than the sum of its proper divisors (5529436869).

12685178571 is a wasteful number, since it uses less digits than its factorization.

12685178571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325261005.

The product of its digits is 940800, while the sum is 51.

The spelling of 12685178571 in words is "twelve billion, six hundred eighty-five million, one hundred seventy-eight thousand, five hundred seventy-one".