544400893440 has 240 divisors, whose sum is σ = 1888672273488. Its totient is φ = 144922656768.

The previous prime is 544400893409. The next prime is 544400893453. The reversal of 544400893440 is 44398004445.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13504354 + ... + 13544606.

Almost surely, 2^544400893440 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 544400893440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944336136744).

544400893440 is an abundant number, since it is smaller than the sum of its proper divisors (1344271380048).

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

544400893440 is a wasteful number, since it uses less digits than its factorization.

544400893440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40869 (or 40850 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

Adding to 544400893440 its reverse (44398004445), we get a palindrome (588798897885).

The spelling of 544400893440 in words is "five hundred forty-four billion, four hundred million, eight hundred ninety-three thousand, four hundred forty".