12172641696 has 36 divisors (see below), whose sum is σ = 34615950642. Its totient is φ = 4057547136.

The previous prime is 12172641667. The next prime is 12172641731. The reversal of 12172641696 is 69614627121.

12172641696 is a `hidden beast` number, since 121 + 7 + 26 + 416 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11671777296 + 500864400 = 108036^2 + 22380^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21132771 + ... + 21133346.

Almost surely, 2^12172641696 is an apocalyptic number.

12172641696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12172641696 is an abundant number, since it is smaller than the sum of its proper divisors (22443308946).

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

12172641696 is a wasteful number, since it uses less digits than its factorization.

12172641696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42266133 (or 42266122 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 12172641696 in words is "twelve billion, one hundred seventy-two million, six hundred forty-one thousand, six hundred ninety-six".