12643442133787 has 8 divisors (see below), whose sum is σ = 12648102037200. Its totient is φ = 12638782851744.

The previous prime is 12643442133779. The next prime is 12643442133821. The reversal of 12643442133787 is 78733124434621.

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 12643442133787 - 2³ = 12643442133779 is a prime.

It is a super-2 number, since 2×12643442133787² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12643442133887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42706233 + ... + 43001269.

It is an arithmetic number, because the mean of its divisors is an integer number (1581012754650).

Almost surely, 2^{12643442133787} is an apocalyptic number.

12643442133787 is a deficient number, since it is larger than the sum of its proper divisors (4659903413).

12643442133787 is a wasteful number, since it uses less digits than its factorization.

12643442133787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310685.

The product of its digits is 16257024, while the sum is 55.

It can be divided in two parts, 126434 and 42133787, that added together give a triangular number (42260221 = T₉₁₉₃).

The spelling of 12643442133787 in words is "twelve trillion, six hundred forty-three billion, four hundred forty-two million, one hundred thirty-three thousand, seven hundred eighty-seven".