12457529578 has 8 divisors (see below), whose sum is σ = 20123701668. Its totient is φ = 5749629024.

The previous prime is 12457529551. The next prime is 12457529597. The reversal of 12457529578 is 87592575421.

12457529578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11202740649 + 1254788929 = 105843^2 + 35423^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239567851 + ... + 239567902.

Almost surely, 2^12457529578 is an apocalyptic number.

12457529578 is a deficient number, since it is larger than the sum of its proper divisors (7666172090).

12457529578 is a wasteful number, since it uses less digits than its factorization.

12457529578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479135768.

The product of its digits is 7056000, while the sum is 55.

The spelling of 12457529578 in words is "twelve billion, four hundred fifty-seven million, five hundred twenty-nine thousand, five hundred seventy-eight".