13171857812 has 12 divisors (see below), whose sum is σ = 23058878976. Its totient is φ = 6583606680.

The previous prime is 13171857799. The next prime is 13171857817. The reversal of 13171857812 is 21875817131.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13171857817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567764 + ... + 590507.

It is an arithmetic number, because the mean of its divisors is an integer number (1921573248).

Almost surely, 2^13171857812 is an apocalyptic number.

It is an amenable number.

13171857812 is a deficient number, since it is larger than the sum of its proper divisors (9887021164).

13171857812 is a wasteful number, since it uses less digits than its factorization.

13171857812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161118 (or 1161116 counting only the distinct ones).

The product of its digits is 94080, while the sum is 44.

The spelling of 13171857812 in words is "thirteen billion, one hundred seventy-one million, eight hundred fifty-seven thousand, eight hundred twelve".