64444226426 has 8 divisors (see below), whose sum is σ = 96668006580. Its totient is φ = 32221557568.

The previous prime is 64444226423. The next prime is 64444226461. The reversal of 64444226426 is 62462244446.

It can be written as a sum of positive squares in 2 ways, for example, as 64313467201 + 130759225 = 253601^2 + 11435^2 .

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

It is not an unprimeable number, because it can be changed into a prime (64444226423) 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 3 ways as a sum of consecutive naturals, for example, 113381 + ... + 376488.

Almost surely, 2^64444226426 is an apocalyptic number.

64444226426 is a deficient number, since it is larger than the sum of its proper divisors (32223780154).

64444226426 is a wasteful number, since it uses less digits than its factorization.

64444226426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555648.

The product of its digits is 1769472, while the sum is 44.

The spelling of 64444226426 in words is "sixty-four billion, four hundred forty-four million, two hundred twenty-six thousand, four hundred twenty-six".