12446623312553 has 4 divisors (see below), whose sum is σ = 12446642332800. Its totient is φ = 12446604292308.

The previous prime is 12446623312547. The next prime is 12446623312561. The reversal of 12446623312553 is 35521332664421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12446623312553 - 2¹⁴ = 12446623296169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12446623312498 and 12446623312507.

It is not an unprimeable number, because it can be changed into a prime (12446623912553) 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, 8492225 + ... + 9849422.

It is an arithmetic number, because the mean of its divisors is an integer number (3111660583200).

Almost surely, 2^{12446623312553} is an apocalyptic number.

It is an amenable number.

12446623312553 is a deficient number, since it is larger than the sum of its proper divisors (19020247).

12446623312553 is an equidigital number, since it uses as much as digits as its factorization.

12446623312553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19020246.

The product of its digits is 3110400, while the sum is 47.

Adding to 12446623312553 its reverse (35521332664421), we get a palindrome (47967955976974).

The spelling of 12446623312553 in words is "twelve trillion, four hundred forty-six billion, six hundred twenty-three million, three hundred twelve thousand, five hundred fifty-three".