12878044633 has 4 divisors (see below), whose sum is σ = 12880531620. Its totient is φ = 12875557648.

The previous prime is 12878044601. The next prime is 12878044639. The reversal of 12878044633 is 33644087821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5843532249 + 7034512384 = 76443^2 + 83872^2 .

It is a cyclic number.

It is not a de Polignac number, because 12878044633 - 2⁵ = 12878044601 is a prime.

It is a super-3 number, since 3×12878044633³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12878044639) 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, 1235710 + ... + 1246087.

It is an arithmetic number, because the mean of its divisors is an integer number (3220132905).

Almost surely, 2^12878044633 is an apocalyptic number.

It is an amenable number.

12878044633 is a deficient number, since it is larger than the sum of its proper divisors (2486987).

12878044633 is an equidigital number, since it uses as much as digits as its factorization.

12878044633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486986.

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 12878044633 in words is "twelve billion, eight hundred seventy-eight million, forty-four thousand, six hundred thirty-three".