44161642564 has 12 divisors (see below), whose sum is σ = 83227711084. Its totient is φ = 20382296544.

The previous prime is 44161642541. The next prime is 44161642571. The reversal of 44161642564 is 46524616144.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13784638464 + 30377004100 = 117408^2 + 174290^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 44161642564.

It is an unprimeable number.

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, 424631127 + ... + 424631230.

Almost surely, 2^44161642564 is an apocalyptic number.

It is an amenable number.

44161642564 is a deficient number, since it is larger than the sum of its proper divisors (39066068520).

44161642564 is a wasteful number, since it uses less digits than its factorization.

44161642564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849262374 (or 849262372 counting only the distinct ones).

The product of its digits is 552960, while the sum is 43.

The spelling of 44161642564 in words is "forty-four billion, one hundred sixty-one million, six hundred forty-two thousand, five hundred sixty-four".