542603261521 has 8 divisors (see below), whose sum is σ = 576333475560. Its totient is φ = 509074422528.

The previous prime is 542603261483. The next prime is 542603261549. The reversal of 542603261521 is 125162306245.

It can be written as a sum of positive squares in 4 ways, for example, as 65364080896 + 477239180625 = 255664^2 + 690825^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 542603261521 - 2⁹ = 542603261009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542603264521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50338206 + ... + 50348983.

It is an arithmetic number, because the mean of its divisors is an integer number (72041684445).

Almost surely, 2^542603261521 is an apocalyptic number.

It is an amenable number.

542603261521 is a deficient number, since it is larger than the sum of its proper divisors (33730214039).

542603261521 is a wasteful number, since it uses less digits than its factorization.

542603261521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100687523.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 542603261521 its reverse (125162306245), we get a palindrome (667765567766).

The spelling of 542603261521 in words is "five hundred forty-two billion, six hundred three million, two hundred sixty-one thousand, five hundred twenty-one".