12642000005 has 4 divisors (see below), whose sum is σ = 15170400012. Its totient is φ = 10113600000.

The previous prime is 12641999987. The next prime is 12642000013. The reversal of 12642000005 is 50000024621.

It is a happy number.

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 3256071844 + 9385928161 = 57062^2 + 96881^2 .

It is not a de Polignac number, because 12642000005 - 2⁶ = 12641999941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264199996 + ... + 1264200005.

It is an arithmetic number, because the mean of its divisors is an integer number (3792600003).

Almost surely, 2^12642000005 is an apocalyptic number.

It is an amenable number.

12642000005 is a deficient number, since it is larger than the sum of its proper divisors (2528400007).

12642000005 is an equidigital number, since it uses as much as digits as its factorization.

12642000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528400006.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 12642000005 its reverse (50000024621), we get a palindrome (62642024626).

The spelling of 12642000005 in words is "twelve billion, six hundred forty-two million, five", and thus it is an aban number.