64444442528 has 24 divisors (see below), whose sum is σ = 126883479492. Its totient is φ = 32220066816.

The previous prime is 64444442521. The next prime is 64444442539. The reversal of 64444442528 is 82524444446.

It can be written as a sum of positive squares in 2 ways, for example, as 47059492624 + 17384949904 = 216932^2 + 131852^2 .

It is not an unprimeable number, because it can be changed into a prime (64444442521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489626 + ... + 607142.

Almost surely, 2^64444442528 is an apocalyptic number.

It is an amenable number.

64444442528 is a deficient number, since it is larger than the sum of its proper divisors (62439036964).

64444442528 is a wasteful number, since it uses less digits than its factorization.

64444442528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134664 (or 134656 counting only the distinct ones).

The product of its digits is 3932160, while the sum is 47.

The spelling of 64444442528 in words is "sixty-four billion, four hundred forty-four million, four hundred forty-two thousand, five hundred twenty-eight".