12506947144 has 32 divisors (see below), whose sum is σ = 24962148000. Its totient is φ = 5857771392.

The previous prime is 12506947129. The next prime is 12506947147. The reversal of 12506947144 is 44174960521.

It is a self number, because there is not a number n which added to its sum of digits gives 12506947144.

It is not an unprimeable number, because it can be changed into a prime (12506947147) 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, 448734 + ... + 475789.

It is an arithmetic number, because the mean of its divisors is an integer number (780067125).

Almost surely, 2^12506947144 is an apocalyptic number.

It is an amenable number.

12506947144 is a deficient number, since it is larger than the sum of its proper divisors (12455200856).

12506947144 is a wasteful number, since it uses less digits than its factorization.

12506947144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924637 (or 924633 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 12506947144 in words is "twelve billion, five hundred six million, nine hundred forty-seven thousand, one hundred forty-four".