1544454444544 has 80 divisors (see below), whose sum is σ = 3368344318416. Its totient is φ = 701625139200.

The previous prime is 1544454444523. The next prime is 1544454444563. The reversal of 1544454444544 is 4454444544451.

It is a junction number, because it is equal to n+sod(n) for n = 1544454444491 and 1544454444500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9930904 + ... + 10085224.

Almost surely, 2^{1544454444544} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1544454444544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1684172159208).

1544454444544 is an abundant number, since it is smaller than the sum of its proper divisors (1823889873872).

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

1544454444544 is a wasteful number, since it uses less digits than its factorization.

1544454444544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156127 (or 156111 counting only the distinct ones).

The product of its digits is 32768000, while the sum is 52.

Adding to 1544454444544 its reverse (4454444544451), we get a palindrome (5998898988995).

The spelling of 1544454444544 in words is "one trillion, five hundred forty-four billion, four hundred fifty-four million, four hundred forty-four thousand, five hundred forty-four".