12874221634 has 4 divisors (see below), whose sum is σ = 19311332454. Its totient is φ = 6437110816.

The previous prime is 12874221611. The next prime is 12874221643. The reversal of 12874221634 is 43612247821.

12874221634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43612247821 = 3607 ⋅12091003.

It can be written as a sum of positive squares in only one way, i.e., 11150726409 + 1723495225 = 105597^2 + 41515^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218555407 + ... + 3218555410.

Almost surely, 2^12874221634 is an apocalyptic number.

12874221634 is a deficient number, since it is larger than the sum of its proper divisors (6437110820).

12874221634 is an equidigital number, since it uses as much as digits as its factorization.

12874221634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6437110819.

The product of its digits is 129024, while the sum is 40.

The spelling of 12874221634 in words is "twelve billion, eight hundred seventy-four million, two hundred twenty-one thousand, six hundred thirty-four".