542672812309 has 4 divisors (see below), whose sum is σ = 542677660300. Its totient is φ = 542667964320.

The previous prime is 542672812307. The next prime is 542672812421. The reversal of 542672812309 is 903218276245.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 270214911684 + 272457900625 = 519822^2 + 521975^2 .

It is a cyclic number.

It is not a de Polignac number, because 542672812309 - 2¹ = 542672812307 is a prime.

It is a super-2 number, since 2×542672812309² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542672812307) 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 3 ways as a sum of consecutive naturals, for example, 2252022 + ... + 2481319.

It is an arithmetic number, because the mean of its divisors is an integer number (135669415075).

It is a 1-persistent number, because it is pandigital, but 2⋅542672812309 = 1085345624618 is not.

Almost surely, 2^542672812309 is an apocalyptic number.

It is an amenable number.

542672812309 is a deficient number, since it is larger than the sum of its proper divisors (4847991).

542672812309 is a wasteful number, since it uses less digits than its factorization.

542672812309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4847990.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 542672812309 in words is "five hundred forty-two billion, six hundred seventy-two million, eight hundred twelve thousand, three hundred nine".