12628726819 has 4 divisors (see below), whose sum is σ = 12641394544. Its totient is φ = 12616059096.

The previous prime is 12628726813. The next prime is 12628726843. The reversal of 12628726819 is 91862782621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91862782621 = 23 ⋅3994034027.

It is a cyclic number.

It is not a de Polignac number, because 12628726819 - 2¹⁵ = 12628694051 is a prime.

It is a super-2 number, since 2×12628726819² (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 (12628726813) 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, 6332367 + ... + 6334360.

It is an arithmetic number, because the mean of its divisors is an integer number (3160348636).

Almost surely, 2^12628726819 is an apocalyptic number.

12628726819 is a deficient number, since it is larger than the sum of its proper divisors (12667725).

12628726819 is an equidigital number, since it uses as much as digits as its factorization.

12628726819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12667724.

The product of its digits is 1161216, while the sum is 52.

The spelling of 12628726819 in words is "twelve billion, six hundred twenty-eight million, seven hundred twenty-six thousand, eight hundred nineteen".