544021322646640 has 20 divisors (see below), whose sum is σ = 1264849575153624. Its totient is φ = 217608529058624.

The previous prime is 544021322646601. The next prime is 544021322646647. The reversal of 544021322646640 is 46646223120445.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544021322646647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3400133266462 + ... + 3400133266621.

Almost surely, 2^{544021322646640} is an apocalyptic number.

It is an amenable number.

544021322646640 is an abundant number, since it is smaller than the sum of its proper divisors (720828252506984).

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

544021322646640 is a wasteful number, since it uses less digits than its factorization.

544021322646640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6800266533096 (or 6800266533090 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 49.

The spelling of 544021322646640 in words is "five hundred forty-four trillion, twenty-one billion, three hundred twenty-two million, six hundred forty-six thousand, six hundred forty".