544135353144021 has 24 divisors (see below), whose sum is σ = 813077399871360. Its totient is φ = 350247360708000.

The previous prime is 544135353144017. The next prime is 544135353144041. The reversal of 544135353144021 is 120441353531445.

544135353144021 is a `hidden beast` number, since 5 + 4 + 4 + 1 + 3 + 53 + 531 + 4 + 40 + 21 = 666.

It is not a de Polignac number, because 544135353144021 - 2² = 544135353144017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544135353144041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155472496 + ... + 158933846.

It is an arithmetic number, because the mean of its divisors is an integer number (33878224994640).

Almost surely, 2^{544135353144021} is an apocalyptic number.

It is an amenable number.

544135353144021 is a deficient number, since it is larger than the sum of its proper divisors (268942046727339).

544135353144021 is a wasteful number, since it uses less digits than its factorization.

544135353144021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063697 (or 4063694 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 544135353144021 in words is "five hundred forty-four trillion, one hundred thirty-five billion, three hundred fifty-three million, one hundred forty-four thousand, twenty-one".