12428256063643 has 4 divisors (see below), whose sum is σ = 14203721215600. Its totient is φ = 10652790911688.

The previous prime is 12428256063577. The next prime is 12428256063661. The reversal of 12428256063643 is 34636065282421.

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

It is a cyclic number.

It is not a de Polignac number, because 12428256063643 - 2¹³ = 12428256055451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12428256063673) 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, 887732575968 + ... + 887732575981.

It is an arithmetic number, because the mean of its divisors is an integer number (3550930303900).

Almost surely, 2^{12428256063643} is an apocalyptic number.

12428256063643 is a deficient number, since it is larger than the sum of its proper divisors (1775465151957).

12428256063643 is an equidigital number, since it uses as much as digits as its factorization.

12428256063643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775465151956.

The product of its (nonzero) digits is 9953280, while the sum is 52.

The spelling of 12428256063643 in words is "twelve trillion, four hundred twenty-eight billion, two hundred fifty-six million, sixty-three thousand, six hundred forty-three".