12169175972 has 6 divisors (see below), whose sum is σ = 21296057958. Its totient is φ = 6084587984.

The previous prime is 12169175971. The next prime is 12169175981. The reversal of 12169175972 is 27957196121.

It can be written as a sum of positive squares in only one way, i.e., 9931318336 + 2237857636 = 99656^2 + 47306^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12169175972.

It is not an unprimeable number, because it can be changed into a prime (12169175971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1521146993 + ... + 1521147000.

It is an arithmetic number, because the mean of its divisors is an integer number (3549342993).

Almost surely, 2^12169175972 is an apocalyptic number.

It is an amenable number.

12169175972 is a deficient number, since it is larger than the sum of its proper divisors (9126881986).

12169175972 is a wasteful number, since it uses less digits than its factorization.

12169175972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042293997 (or 3042293995 counting only the distinct ones).

The product of its digits is 476280, while the sum is 50.

The spelling of 12169175972 in words is "twelve billion, one hundred sixty-nine million, one hundred seventy-five thousand, nine hundred seventy-two".