12672293881 has 4 divisors (see below), whose sum is σ = 13647085732. Its totient is φ = 11697502032.

The previous prime is 12672293861. The next prime is 12672293897. The reversal of 12672293881 is 18839227621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18839227621 = 5107 ⋅3688903.

It can be written as a sum of positive squares in 2 ways, for example, as 2528581225 + 10143712656 = 50285^2 + 100716^2 .

It is a cyclic number.

It is not a de Polignac number, because 12672293881 - 2¹¹ = 12672291833 is a prime.

It is a super-2 number, since 2×12672293881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12672293861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487395906 + ... + 487395931.

It is an arithmetic number, because the mean of its divisors is an integer number (3411771433).

Almost surely, 2^12672293881 is an apocalyptic number.

It is an amenable number.

12672293881 is a deficient number, since it is larger than the sum of its proper divisors (974791851).

12672293881 is an equidigital number, since it uses as much as digits as its factorization.

12672293881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974791850.

The product of its digits is 580608, while the sum is 49.

The spelling of 12672293881 in words is "twelve billion, six hundred seventy-two million, two hundred ninety-three thousand, eight hundred eighty-one".