12505740892 has 12 divisors (see below), whose sum is σ = 22016095920. Its totient is φ = 6215427776.

The previous prime is 12505740859. The next prime is 12505740893. The reversal of 12505740892 is 29804750521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505740893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9359917 + ... + 9361252.

It is an arithmetic number, because the mean of its divisors is an integer number (1834674660).

Almost surely, 2^12505740892 is an apocalyptic number.

It is an amenable number.

12505740892 is a deficient number, since it is larger than the sum of its proper divisors (9510355028).

12505740892 is a wasteful number, since it uses less digits than its factorization.

12505740892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18721340 (or 18721338 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 12505740892 in words is "twelve billion, five hundred five million, seven hundred forty thousand, eight hundred ninety-two".