64444226425 has 12 divisors (see below), whose sum is σ = 80125090540. Its totient is φ = 51417155520.

The previous prime is 64444226423. The next prime is 64444226461. The reversal of 64444226425 is 52462244446.

It can be written as a sum of positive squares in 6 ways, for example, as 905949801 + 63538276624 = 30099^2 + 252068^2 .

It is not a de Polignac number, because 64444226425 - 2¹ = 64444226423 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 3446130 + ... + 3464779.

Almost surely, 2^64444226425 is an apocalyptic number.

It is an amenable number.

64444226425 is a deficient number, since it is larger than the sum of its proper divisors (15680864115).

64444226425 is a wasteful number, since it uses less digits than its factorization.

64444226425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6911292 (or 6911287 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 43.

The spelling of 64444226425 in words is "sixty-four billion, four hundred forty-four million, two hundred twenty-six thousand, four hundred twenty-five".