86781418751 has 2 divisors, whose sum is σ = 86781418752. Its totient is φ = 86781418750.

The previous prime is 86781418739. The next prime is 86781418813. The reversal of 86781418751 is 15781418768.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86781418751 - 2⁶ = 86781418687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86781418051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43390709375 + 43390709376.

It is an arithmetic number, because the mean of its divisors is an integer number (43390709376).

Almost surely, 2^86781418751 is an apocalyptic number.

86781418751 is a deficient number, since it is larger than the sum of its proper divisors (1).

86781418751 is an equidigital number, since it uses as much as digits as its factorization.

86781418751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3010560, while the sum is 56.

The spelling of 86781418751 in words is "eighty-six billion, seven hundred eighty-one million, four hundred eighteen thousand, seven hundred fifty-one".