12026405663 has 4 divisors (see below), whose sum is σ = 12033267888. Its totient is φ = 12019543440.

The previous prime is 12026405603. The next prime is 12026405723. The reversal of 12026405663 is 36650462021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36650462021 = 79 ⋅463929899.

It is an interprime number because it is at equal distance from previous prime (12026405603) and next prime (12026405723).

It is a cyclic number.

It is not a de Polignac number, because 12026405663 - 2¹⁴ = 12026389279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12026405603) 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, 3428483 + ... + 3431988.

It is an arithmetic number, because the mean of its divisors is an integer number (3008316972).

Almost surely, 2^12026405663 is an apocalyptic number.

12026405663 is a deficient number, since it is larger than the sum of its proper divisors (6862225).

12026405663 is an equidigital number, since it uses as much as digits as its factorization.

12026405663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6862224.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 12026405663 its reverse (36650462021), we get a palindrome (48676867684).

The spelling of 12026405663 in words is "twelve billion, twenty-six million, four hundred five thousand, six hundred sixty-three".