12145025644 has 24 divisors (see below), whose sum is σ = 22389716160. Its totient is φ = 5748458256.

The previous prime is 12145025567. The next prime is 12145025657. The reversal of 12145025644 is 44652054121.

It is a super-2 number, since 2×12145025644² (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, 38199 + ... + 160465.

It is an arithmetic number, because the mean of its divisors is an integer number (932904840).

Almost surely, 2^12145025644 is an apocalyptic number.

It is an amenable number.

12145025644 is a deficient number, since it is larger than the sum of its proper divisors (10244690516).

12145025644 is a wasteful number, since it uses less digits than its factorization.

12145025644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123597 (or 123595 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 12145025644 its reverse (44652054121), we get a palindrome (56797079765).

The spelling of 12145025644 in words is "twelve billion, one hundred forty-five million, twenty-five thousand, six hundred forty-four".