12689895816 has 96 divisors (see below), whose sum is σ = 37371821760. Its totient is φ = 3866645376.

The previous prime is 12689895793. The next prime is 12689895821. The reversal of 12689895816 is 61859898621.

It is a super-3 number, since 3×12689895816³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30595 + ... + 162221.

It is an arithmetic number, because the mean of its divisors is an integer number (389289810).

Almost surely, 2^12689895816 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 12689895816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18685910880).

12689895816 is an abundant number, since it is smaller than the sum of its proper divisors (24681925944).

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

12689895816 is a wasteful number, since it uses less digits than its factorization.

12689895816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131755 (or 131748 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 63.

The spelling of 12689895816 in words is "twelve billion, six hundred eighty-nine million, eight hundred ninety-five thousand, eight hundred sixteen".