12645454621 has 8 divisors (see below), whose sum is σ = 13182617088. Its totient is φ = 12116370000.

The previous prime is 12645454583. The next prime is 12645454631.

12645454621 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12645454621 - 2⁹ = 12645454109 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 (12645454631) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2016265 + ... + 2022526.

It is an arithmetic number, because the mean of its divisors is an integer number (1647827136).

Almost surely, 2^12645454621 is an apocalyptic number.

It is an amenable number.

12645454621 is a deficient number, since it is larger than the sum of its proper divisors (537162467).

12645454621 is a wasteful number, since it uses less digits than its factorization.

12645454621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038923.

The product of its digits is 230400, while the sum is 40.

The spelling of 12645454621 in words is "twelve billion, six hundred forty-five million, four hundred fifty-four thousand, six hundred twenty-one".