12869561016 has 128 divisors (see below), whose sum is σ = 38963232000. Its totient is φ = 3912084864.

The previous prime is 12869561011. The next prime is 12869561063. The reversal of 12869561016 is 61016596821.

12869561016 is a `hidden beast` number, since 1 + 2 + 86 + 9 + 561 + 0 + 1 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12869561011) 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, 205455 + ... + 260673.

It is an arithmetic number, because the mean of its divisors is an integer number (304400250).

Almost surely, 2^12869561016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12869561016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19481616000).

12869561016 is an abundant number, since it is smaller than the sum of its proper divisors (26093670984).

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

12869561016 is a wasteful number, since it uses less digits than its factorization.

12869561016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55330 (or 55320 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 12869561016 in words is "twelve billion, eight hundred sixty-nine million, five hundred sixty-one thousand, sixteen".