12641216125 has 8 divisors (see below), whose sum is σ = 15776237880. Its totient is φ = 10112972800.

The previous prime is 12641216117. The next prime is 12641216129. The reversal of 12641216125 is 52161214621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 284225881 + 12356990244 = 16859^2 + 111162^2 .

It is not a de Polignac number, because 12641216125 - 2³ = 12641216117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12641216129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50564740 + ... + 50564989.

It is an arithmetic number, because the mean of its divisors is an integer number (1972029735).

Almost surely, 2^12641216125 is an apocalyptic number.

It is an amenable number.

12641216125 is a deficient number, since it is larger than the sum of its proper divisors (3135021755).

12641216125 is an equidigital number, since it uses as much as digits as its factorization.

12641216125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101129744 (or 101129734 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The spelling of 12641216125 in words is "twelve billion, six hundred forty-one million, two hundred sixteen thousand, one hundred twenty-five".