12695866891876 has 81 divisors (see below), whose sum is σ = 26046657027027. Its totient is φ = 5398991040240.

The previous prime is 12695866891849. The next prime is 12695866891879. The reversal of 12695866891876 is 67819866859621.

The square root of 12695866891876 is 3563126.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×12695866891876² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12695866891876.

It is not an unprimeable number, because it can be changed into a prime (12695866891879) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6933842281 + ... + 6933844111.

Almost surely, 2^{12695866891876} is an apocalyptic number.

12695866891876 is the 3563126-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12695866891876

12695866891876 is an abundant number, since it is smaller than the sum of its proper divisors (13350790135151).

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

12695866891876 is an frugal number, since it uses more digits than its factorization.

12695866891876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3958 (or 1979 counting only the distinct ones).

The product of its digits is 3762339840, while the sum is 82.

The spelling of 12695866891876 in words is "twelve trillion, six hundred ninety-five billion, eight hundred sixty-six million, eight hundred ninety-one thousand, eight hundred seventy-six".