12664216454 has 4 divisors (see below), whose sum is σ = 18996324684. Its totient is φ = 6332108226.

The previous prime is 12664216421. The next prime is 12664216457. The reversal of 12664216454 is 45461246621.

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

It is a super-3 number, since 3×12664216454³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664216457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3166054112 + ... + 3166054115.

It is an arithmetic number, because the mean of its divisors is an integer number (4749081171).

Almost surely, 2^12664216454 is an apocalyptic number.

12664216454 is a deficient number, since it is larger than the sum of its proper divisors (6332108230).

12664216454 is an equidigital number, since it uses as much as digits as its factorization.

12664216454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332108229.

The product of its digits is 276480, while the sum is 41.

The spelling of 12664216454 in words is "twelve billion, six hundred sixty-four million, two hundred sixteen thousand, four hundred fifty-four".