6782367287981 has 2 divisors, whose sum is σ = 6782367287982. Its totient is φ = 6782367287980.

The previous prime is 6782367287977. The next prime is 6782367288061. The reversal of 6782367287981 is 1897827632876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3676771735081 + 3105595552900 = 1917491^2 + 1762270^2 .

It is a cyclic number.

It is not a de Polignac number, because 6782367287981 - 2² = 6782367287977 is a prime.

It is a super-2 number, since 2×6782367287981² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6782367287899 and 6782367287908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6782367287281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3391183643990 + 3391183643991.

It is an arithmetic number, because the mean of its divisors is an integer number (3391183643991).

Almost surely, 2^{6782367287981} is an apocalyptic number.

It is an amenable number.

6782367287981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6782367287981 is an equidigital number, since it uses as much as digits as its factorization.

6782367287981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 682795008, while the sum is 74.

The spelling of 6782367287981 in words is "six trillion, seven hundred eighty-two billion, three hundred sixty-seven million, two hundred eighty-seven thousand, nine hundred eighty-one".