542603666065 has 24 divisors (see below), whose sum is σ = 657895807800. Its totient is φ = 429614337024.

The previous prime is 542603666027. The next prime is 542603666071. The reversal of 542603666065 is 560666306245.

It can be written as a sum of positive squares in 12 ways, for example, as 23283097744 + 519320568321 = 152588^2 + 720639^2 .

It is not a de Polignac number, because 542603666065 - 2⁹ = 542603665553 is a prime.

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, 58034011 + ... + 58043359.

It is an arithmetic number, because the mean of its divisors is an integer number (27412325325).

Almost surely, 2^542603666065 is an apocalyptic number.

It is an amenable number.

542603666065 is a deficient number, since it is larger than the sum of its proper divisors (115292141735).

542603666065 is an equidigital number, since it uses as much as digits as its factorization.

542603666065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10549 (or 10440 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 49.

The spelling of 542603666065 in words is "five hundred forty-two billion, six hundred three million, six hundred sixty-six thousand, sixty-five".