2239891669781 has 8 divisors (see below), whose sum is σ = 2337816066264. Its totient is φ = 2144028839680.

The previous prime is 2239891669753. The next prime is 2239891669801. The reversal of 2239891669781 is 1879661989322.

It can be written as a sum of positive squares in 4 ways, for example, as 729059822500 + 1510831847281 = 853850^2 + 1229159^2 .

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 2239891669781 - 2¹⁴ = 2239891653397 is a prime.

It is a super-2 number, since 2×2239891669781² (a number of 26 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 (2239891663781) 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 7 ways as a sum of consecutive naturals, for example, 515389376 + ... + 515393721.

It is an arithmetic number, because the mean of its divisors is an integer number (292227008283).

Almost surely, 2^{2239891669781} is an apocalyptic number.

It is an amenable number.

2239891669781 is a deficient number, since it is larger than the sum of its proper divisors (97924396483).

2239891669781 is a wasteful number, since it uses less digits than its factorization.

2239891669781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030783191.

The product of its digits is 141087744, while the sum is 71.

The spelling of 2239891669781 in words is "two trillion, two hundred thirty-nine billion, eight hundred ninety-one million, six hundred sixty-nine thousand, seven hundred eighty-one".