12173811852 has 12 divisors (see below), whose sum is σ = 28405561016. Its totient is φ = 4057937280.

The previous prime is 12173811827. The next prime is 12173811857. The reversal of 12173811852 is 25811837121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 12173811852.

It is not an unprimeable number, because it can be changed into a prime (12173811857) 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, 507242149 + ... + 507242172.

Almost surely, 2^12173811852 is an apocalyptic number.

12173811852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12173811852 is an abundant number, since it is smaller than the sum of its proper divisors (16231749164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12173811852 is a wasteful number, since it uses less digits than its factorization.

12173811852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014484328 (or 1014484326 counting only the distinct ones).

The product of its digits is 26880, while the sum is 39.

The spelling of 12173811852 in words is "twelve billion, one hundred seventy-three million, eight hundred eleven thousand, eight hundred fifty-two".