12170000072 has 16 divisors (see below), whose sum is σ = 22821420300. Its totient is φ = 6084288000.

The previous prime is 12170000071. The next prime is 12170000107. The reversal of 12170000072 is 27000007121.

It can be written as a sum of positive squares in 2 ways, for example, as 11580772996 + 589227076 = 107614^2 + 24274^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12169999999 and 12170000053.

It is not an unprimeable number, because it can be changed into a prime (12170000071) 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, 12497 + ... + 156512.

Almost surely, 2^12170000072 is an apocalyptic number.

It is an amenable number.

12170000072 is a deficient number, since it is larger than the sum of its proper divisors (10651420228).

12170000072 is a wasteful number, since it uses less digits than its factorization.

12170000072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178016 (or 178012 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 20.

Adding to 12170000072 its reverse (27000007121), we get a palindrome (39170007193).

The spelling of 12170000072 in words is "twelve billion, one hundred seventy million, seventy-two", and thus it is an aban number.