86320643531 has 2 divisors, whose sum is σ = 86320643532. Its totient is φ = 86320643530.

The previous prime is 86320643503. The next prime is 86320643533. The reversal of 86320643531 is 13534602368.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86320643531 - 2³⁴ = 69140774347 is a prime.

It is a super-2 number, since 2×86320643531² (a number of 23 digits) contains 22 as substring.

Together with 86320643533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86320643533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43160321765 + 43160321766.

It is an arithmetic number, because the mean of its divisors is an integer number (43160321766).

Almost surely, 2^86320643531 is an apocalyptic number.

86320643531 is a deficient number, since it is larger than the sum of its proper divisors (1).

86320643531 is an equidigital number, since it uses as much as digits as its factorization.

86320643531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 86320643531 in words is "eighty-six billion, three hundred twenty million, six hundred forty-three thousand, five hundred thirty-one".