64442326426 has 12 divisors (see below), whose sum is σ = 99346629438. Its totient is φ = 31350319632.

The previous prime is 64442326409. The next prime is 64442326433. The reversal of 64442326426 is 62462324446.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 62597538025 + 1844788401 = 250195^2 + 42951^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 11765401 + ... + 11770876.

Almost surely, 2^64442326426 is an apocalyptic number.

64442326426 is a deficient number, since it is larger than the sum of its proper divisors (34904303012).

64442326426 is a wasteful number, since it uses less digits than its factorization.

64442326426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23536353 (or 23536316 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 43.

The spelling of 64442326426 in words is "sixty-four billion, four hundred forty-two million, three hundred twenty-six thousand, four hundred twenty-six".