286168781783681 has 4 divisors (see below), whose sum is σ = 286178031864132. Its totient is φ = 286159531703232.

The previous prime is 286168781783603. The next prime is 286168781783707. The reversal of 286168781783681 is 186387187861682.

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 30155693616400 + 256013088167281 = 5491420^2 + 16000409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-286168781783681 is a prime.

It is a super-2 number, since 2×286168781783681² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 286168781783596 and 286168781783605.

It is not an unprimeable number, because it can be changed into a prime (286168781780681) 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 3 ways as a sum of consecutive naturals, for example, 4624993820 + ... + 4625055693.

It is an arithmetic number, because the mean of its divisors is an integer number (71544507966033).

Almost surely, 2^{286168781783681} is an apocalyptic number.

It is an amenable number.

286168781783681 is a deficient number, since it is larger than the sum of its proper divisors (9250080451).

286168781783681 is an equidigital number, since it uses as much as digits as its factorization.

286168781783681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9250080450.

The product of its digits is 2080899072, while the sum is 80.

The spelling of 286168781783681 in words is "two hundred eighty-six trillion, one hundred sixty-eight billion, seven hundred eighty-one million, seven hundred eighty-three thousand, six hundred eighty-one".