12645421355 has 16 divisors (see below), whose sum is σ = 18362427840. Its totient is φ = 8161078272.

The previous prime is 12645421337. The next prime is 12645421403. The reversal of 12645421355 is 55312454621.

It is a cyclic number.

It is not a de Polignac number, because 12645421355 - 2⁸ = 12645421099 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10625810 + ... + 10626999.

It is an arithmetic number, because the mean of its divisors is an integer number (1147651740).

Almost surely, 2^12645421355 is an apocalyptic number.

12645421355 is a deficient number, since it is larger than the sum of its proper divisors (5717006485).

12645421355 is a wasteful number, since it uses less digits than its factorization.

12645421355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21252838.

The product of its digits is 144000, while the sum is 38.

Adding to 12645421355 its reverse (55312454621), we get a palindrome (67957875976).

The spelling of 12645421355 in words is "twelve billion, six hundred forty-five million, four hundred twenty-one thousand, three hundred fifty-five".