242138528727605 has 4 divisors (see below), whose sum is σ = 290566234473132. Its totient is φ = 193710822982080.

The previous prime is 242138528727587. The next prime is 242138528727629. The reversal of 242138528727605 is 506727825831242.

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 168129655456324 + 74008873271281 = 12966482^2 + 8602841^2 .

It is not a de Polignac number, because 242138528727605 - 2⁶ = 242138528727541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24213852872756 + ... + 24213852872765.

It is an arithmetic number, because the mean of its divisors is an integer number (72641558618283).

Almost surely, 2^{242138528727605} is an apocalyptic number.

It is an amenable number.

242138528727605 is a deficient number, since it is larger than the sum of its proper divisors (48427705745527).

242138528727605 is an equidigital number, since it uses as much as digits as its factorization.

242138528727605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48427705745526.

The product of its (nonzero) digits is 90316800, while the sum is 62.

The spelling of 242138528727605 in words is "two hundred forty-two trillion, one hundred thirty-eight billion, five hundred twenty-eight million, seven hundred twenty-seven thousand, six hundred five".