12829609642 has 4 divisors (see below), whose sum is σ = 19244414466. Its totient is φ = 6414804820.

The previous prime is 12829609633. The next prime is 12829609673. The reversal of 12829609642 is 24690692821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24690692821 = 59 ⋅418486319.

It can be written as a sum of positive squares in only one way, i.e., 10574214561 + 2255395081 = 102831^2 + 47491^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3207402409 + ... + 3207402412.

Almost surely, 2^12829609642 is an apocalyptic number.

12829609642 is a deficient number, since it is larger than the sum of its proper divisors (6414804824).

12829609642 is an equidigital number, since it uses as much as digits as its factorization.

12829609642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6414804823.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 12829609642 in words is "twelve billion, eight hundred twenty-nine million, six hundred nine thousand, six hundred forty-two".