544252123521 has 12 divisors (see below), whose sum is σ = 786247194772. Its totient is φ = 362786177376.

The previous prime is 544252123507. The next prime is 544252123559. The reversal of 544252123521 is 125321252445.

544252123521 is a `hidden beast` number, since 5 + 4 + 4 + 2 + 5 + 2 + 123 + 521 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 497498872896 + 46753250625 = 705336^2 + 216225^2 .

It is not a de Polignac number, because 544252123521 - 2⁵ = 544252123489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (544252123421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3976606 + ... + 4111191.

Almost surely, 2^544252123521 is an apocalyptic number.

It is an amenable number.

544252123521 is a deficient number, since it is larger than the sum of its proper divisors (241995071251).

544252123521 is a wasteful number, since it uses less digits than its factorization.

544252123521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8095280 (or 8095277 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

Adding to 544252123521 its reverse (125321252445), we get a palindrome (669573375966).

The spelling of 544252123521 in words is "five hundred forty-four billion, two hundred fifty-two million, one hundred twenty-three thousand, five hundred twenty-one".