86320643501 has 2 divisors, whose sum is σ = 86320643502. Its totient is φ = 86320643500.

The previous prime is 86320643491. The next prime is 86320643503. The reversal of 86320643501 is 10534602368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47830127401 + 38490516100 = 218701^2 + 196190^2 .

It is a cyclic number.

It is not a de Polignac number, because 86320643501 - 2¹⁰ = 86320642477 is a prime.

It is a Sophie Germain prime.

Together with 86320643503, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86320643503) 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, 43160321750 + 43160321751.

It is an arithmetic number, because the mean of its divisors is an integer number (43160321751).

Almost surely, 2^86320643501 is an apocalyptic number.

It is an amenable number.

86320643501 is a deficient number, since it is larger than the sum of its proper divisors (1).

86320643501 is an equidigital number, since it uses as much as digits as its factorization.

86320643501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 86320643501 in words is "eighty-six billion, three hundred twenty million, six hundred forty-three thousand, five hundred one".