12523657894 has 24 divisors (see below), whose sum is σ = 20980997352. Its totient is φ = 5560168320.

The previous prime is 12523657879. The next prime is 12523657897. The reversal of 12523657894 is 49875632521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12523657897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113259 + ... + 194614.

It is an arithmetic number, because the mean of its divisors is an integer number (874208223).

Almost surely, 2^12523657894 is an apocalyptic number.

12523657894 is a deficient number, since it is larger than the sum of its proper divisors (8457339458).

12523657894 is a wasteful number, since it uses less digits than its factorization.

12523657894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307972 (or 307929 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 52.

The spelling of 12523657894 in words is "twelve billion, five hundred twenty-three million, six hundred fifty-seven thousand, eight hundred ninety-four".