544001661544 has 32 divisors (see below), whose sum is σ = 1124202139200. Its totient is φ = 244724267520.

The previous prime is 544001661527. The next prime is 544001661557. The reversal of 544001661544 is 445166100445.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 544001661497 and 544001661506.

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 7 ways as a sum of consecutive naturals, for example, 31856604 + ... + 31873675.

It is an arithmetic number, because the mean of its divisors is an integer number (35131316850).

Almost surely, 2^544001661544 is an apocalyptic number.

It is an amenable number.

544001661544 is an abundant number, since it is smaller than the sum of its proper divisors (580200477656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

544001661544 is a wasteful number, since it uses less digits than its factorization.

544001661544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63730393 (or 63730389 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

Adding to 544001661544 its reverse (445166100445), we get a palindrome (989167761989).

The spelling of 544001661544 in words is "five hundred forty-four billion, one million, six hundred sixty-one thousand, five hundred forty-four".