12651670281 has 4 divisors (see below), whose sum is σ = 16868893712. Its totient is φ = 8434446852.

The previous prime is 12651670279. The next prime is 12651670309. The reversal of 12651670281 is 18207615621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12651670281 - 2¹ = 12651670279 is a prime.

It is a super-2 number, since 2×12651670281² (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 (12651670261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2108611711 + ... + 2108611716.

It is an arithmetic number, because the mean of its divisors is an integer number (4217223428).

Almost surely, 2^12651670281 is an apocalyptic number.

It is an amenable number.

12651670281 is a deficient number, since it is larger than the sum of its proper divisors (4217223431).

12651670281 is an equidigital number, since it uses as much as digits as its factorization.

12651670281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217223430.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 12651670281 in words is "twelve billion, six hundred fifty-one million, six hundred seventy thousand, two hundred eighty-one".