64641426443 has 8 divisors (see below), whose sum is σ = 70626919680. Its totient is φ = 58674099880.

The previous prime is 64641426439. The next prime is 64641426449. The reversal of 64641426443 is 34462414646.

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

It is not a de Polignac number, because 64641426443 - 2² = 64641426439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64641426394 and 64641426403.

It is not an unprimeable number, because it can be changed into a prime (64641426449) 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, 4534223 + ... + 4548456.

It is an arithmetic number, because the mean of its divisors is an integer number (8828364960).

Almost surely, 2^64641426443 is an apocalyptic number.

64641426443 is a deficient number, since it is larger than the sum of its proper divisors (5985493237).

64641426443 is a wasteful number, since it uses less digits than its factorization.

64641426443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9083337.

The product of its digits is 1327104, while the sum is 44.

The spelling of 64641426443 in words is "sixty-four billion, six hundred forty-one million, four hundred twenty-six thousand, four hundred forty-three".