241657778569 has 9 divisors (see below), whose sum is σ = 255055879143. Its totient is φ = 228930099552.

The previous prime is 241657778543. The next prime is 241657778587. The reversal of 241657778569 is 965877756142.

The square root of 241657778569 is 491587.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 116120785225 + 125536993344 = 340765^2 + 354312^2 .

It is not a de Polignac number, because 241657778569 - 2⁹ = 241657778057 is a prime.

It is a super-2 number, since 2×241657778569² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (241657778269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9327217 + ... + 9353089.

It is an arithmetic number, because the mean of its divisors is an integer number (28339542127).

Almost surely, 2^241657778569 is an apocalyptic number.

241657778569 is the 491587-th square number.

241657778569 is the 245794-th centered octagonal number.

It is an amenable number.

241657778569 is a deficient number, since it is larger than the sum of its proper divisors (13398100574).

241657778569 is an frugal number, since it uses more digits than its factorization.

241657778569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51784 (or 25892 counting only the distinct ones).

The product of its digits is 177811200, while the sum is 67.

The spelling of 241657778569 in words is "two hundred forty-one billion, six hundred fifty-seven million, seven hundred seventy-eight thousand, five hundred sixty-nine".