44181381652 has 24 divisors (see below), whose sum is σ = 79420710600. Its totient is φ = 21489955200.

The previous prime is 44181381589. The next prime is 44181381653. The reversal of 44181381652 is 25618318144.

It can be written as a sum of positive squares in 4 ways, for example, as 5795167876 + 38386213776 = 76126^2 + 195924^2 .

It is a junction number, because it is equal to n+sod(n) for n = 44181381599 and 44181381608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44181381653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 969474 + ... + 1014022.

It is an arithmetic number, because the mean of its divisors is an integer number (3309196275).

Almost surely, 2^44181381652 is an apocalyptic number.

It is an amenable number.

44181381652 is a deficient number, since it is larger than the sum of its proper divisors (35239328948).

44181381652 is a wasteful number, since it uses less digits than its factorization.

44181381652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51291 (or 51289 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

Adding to 44181381652 its reverse (25618318144), we get a palindrome (69799699796).

The spelling of 44181381652 in words is "forty-four billion, one hundred eighty-one million, three hundred eighty-one thousand, six hundred fifty-two".