12569343738 has 64 divisors (see below), whose sum is σ = 30022410240. Its totient is φ = 3430132992.

The previous prime is 12569343727. The next prime is 12569343739. The reversal of 12569343738 is 83734396521.

It is not an unprimeable number, because it can be changed into a prime (12569343739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 685506 + ... + 703602.

It is an arithmetic number, because the mean of its divisors is an integer number (469100160).

Almost surely, 2^12569343738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12569343738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15011205120).

12569343738 is an abundant number, since it is smaller than the sum of its proper divisors (17453066502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12569343738 is a wasteful number, since it uses less digits than its factorization.

12569343738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18851.

The product of its digits is 3265920, while the sum is 51.

The spelling of 12569343738 in words is "twelve billion, five hundred sixty-nine million, three hundred forty-three thousand, seven hundred thirty-eight".