12543171072 has 80 divisors (see below), whose sum is σ = 34868750400. Its totient is φ = 3999260672.

The previous prime is 12543171029. The next prime is 12543171131. The reversal of 12543171072 is 27017134521.

It is a super-2 number, since 2×12543171072² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142197 + ... + 212852.

It is an arithmetic number, because the mean of its divisors is an integer number (435859380).

Almost surely, 2^12543171072 is an apocalyptic number.

12543171072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12543171072 is an abundant number, since it is smaller than the sum of its proper divisors (22325579328).

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

12543171072 is an equidigital number, since it uses as much as digits as its factorization.

12543171072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355093 (or 355077 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The spelling of 12543171072 in words is "twelve billion, five hundred forty-three million, one hundred seventy-one thousand, seventy-two".