12569343728 has 40 divisors (see below), whose sum is σ = 24538637760. Its totient is φ = 6236939520.

The previous prime is 12569343727. The next prime is 12569343739. The reversal of 12569343728 is 82734396521.

It is a super-2 number, since 2×12569343728² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12569343727) 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 7 ways as a sum of consecutive naturals, for example, 1469801 + ... + 1478327.

It is an arithmetic number, because the mean of its divisors is an integer number (613465944).

Almost surely, 2^12569343728 is an apocalyptic number.

It is an amenable number.

12569343728 is a deficient number, since it is larger than the sum of its proper divisors (11969294032).

12569343728 is a wasteful number, since it uses less digits than its factorization.

12569343728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9225 (or 9219 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 50.

The spelling of 12569343728 in words is "twelve billion, five hundred sixty-nine million, three hundred forty-three thousand, seven hundred twenty-eight".